CBSE Class 11 Economics Measures Of Central Tendency Assignment

Read and download free pdf of CBSE Class 11 Economics Measures Of Central Tendency Assignment. Get printable school Assignments for Class 11 Economics. Class 11 students should practise questions and answers given here for Statistics For Economics Chapter 5 Measures Of Central Tendency Economics in Class 11 which will help them to strengthen their understanding of all important topics. Students should also download free pdf of Printable Worksheets for Class 11 Economics prepared as per the latest books and syllabus issued by NCERT, CBSE, KVS and do problems daily to score better marks in tests and examinations

Assignment for Class 11 Economics Statistics For Economics Chapter 5 Measures Of Central Tendency

Class 11 Economics students should refer to the following printable assignment in Pdf for Statistics For Economics Chapter 5 Measures Of Central Tendency in Class 11. This test paper with questions and answers for Class 11 Economics will be very useful for exams and help you to score good marks

Statistics For Economics Chapter 5 Measures Of Central Tendency Class 11 Economics Assignment

Points to Remember :-

* A central tendency is a single figure that represents the whole mass of data.

* Arithmetic mean or mean is the number which is obtained by adding the values of all the items of a series and dividing the total by the number of items.

* When all items of a series are given equal importance than it is called simple arithmetical mean and when different items of a series are given different weights according with their relative importance is known weighted arithmetic mean.

* Median is the middle value of the series when arranged in ascending order.

* When a series is divided into more than two parts, the dividing values are called partition values.

* If a statistical series is divided into four equal parts, the end value of each part is called a quartile and denoted by ‘Q’.

* The first quantile or lower quartile (Q1) is that value which divides the first half of an orderly arranged series into two equal parts.

* Third quartile or upper quartile (Q3) is that value which divides the latter half of an ascending orderly arrenged series into two equal parts.

* Mode is the value which occurs most frequently in the series, that is modal value has the highest frequency in the series.

* Main purposes and functions of averages.
(i) To represent a brief picture of data.
(ii) Comparison.
(iii) Formulation of policies.
(iv) Basis of statistical analysis.
(v) One value for all the group or series.

* Essentials of a good average.
(i) Easy to understand.
(ii) Easy to compute
(iii) Rigidly defined.
(iv) Based on all the items of series.
(v) Certain in character
(vi) Least effect of a change in the sample.
(vii) Capable of algebraic treatment.

* Merits of Arithmatic mean
(i) Simplicity
(ii) Certainty
(iii) Based on all values.
(iv) Algebraic treatment possible.
(v) Basis of comparision.
(vi) Accuracy test possible.

* Demerits of Arithmatic mean.
(i) Effect of extreme values.
(ii) Mean value may not figure in the series
(iii) unsuitability.
(iv) Misleading conclusions.
(v) Can not be used in case of qualitative phenomenon.

* Merits of Median
(i) Simple measure of central tendency.
(ii) It is not affected by extreame observations.
(iii) Possible even when data is incomplete.
(iv) Median can be determined by graphic presentation of data.
(v) It has a definite value.

* Demerits of median.
(i) Not based on all the items in the series.
(ii) Not suitable for algebraic treatment.
(iii) Arranging the data in ascending order takes much time.
(iv) Affected by fluctuations of items.

* Merits of mode
(i) Simple and popular measure of central tendency.
(ii) It can be located graphically with the help of histogram.
(iii) Less effect of marginal values.
(iv) No need of knowing all the items of series.
(v) It is the most representative value in the given series.

* Demerits of mode
(i) It is an uncertain measure
(ii) It is not capable of algebrate treatment.
(iii) Procedure of grouping is complex.
(iv) It is not based on all observations.

* Relation among mean, median and mode
Mode = 3 median - 2 mean

* Location of median by graph -
(i) By ‘Less than’ or ‘More than’ ogives method a frequency distribution series is first converted into a less than or more than cummulative series as in the case of ogives, data are presented graphically to make a ‘less than’ or ‘more than’ ogive N/2 item of the series is determined and from this print (on the y-axis of the graph) a perpendicular is drawn to the right to cut the cummulative frequency curve. The median value is the one where cummulative frequency curve cuts corresponding to x-axis.

(ii) Less than and more than ogive curve method present the data graphically in the form of ‘less than’ and ‘more than’ ogives simultamously. The two ogives are superimposed upon each other to determine the median value. Mark the point where the ogive curve cut each other, draw a perpendicular from that point on xaxis, the corresponding value on the x-axis would be the median value.

* Graphic representation of mode -
Prepare a histogram from the given data find out the ractangle whose hight is the highest. This will be the modal class. Draw two lines - one joining the top right point of the ractangle preceding the modal class with top right point of the modal class. The other joining the top left point of the modal class with the top left point of the post modal class. From the point of intersection of these two diagonal lines, draw a perpendicular on horizontal axis i.e. x-axis the point where this perpendicular line meets x-axis, gives us the value of mode.

* Formulae of calculating arithmatic mean - 
cbse-class-11-economics-measures-of-central-tendency-assignment
cbse-class-11-economics-measures-of-central-tendency-assignment

Where, L1 = Lower limit of modal class
fo = Frequency of the group preceding the modal class
f1 = Frequency of the modal class.
f2 = Rrequency of the group succeeding the modal class
c = Magnitude or class interval of the modal class

MCQ Questions Class 11 Economics Measures Of Central Tendency

Question : Any measure indicating the centre of a set of data, arranged in an increasing or decreasing order of magnitude, is called a measure of:
(a) Skewness
(b) Symmetry
(c) Central tendency
(d) Dispersion
Answer : C
 
Question : Scores that differ greatly from the measures of central tendency are called:
(a) Raw scores
(b) The best scores
(c) Extreme scores
(d) Z-scores
Answer : C 
 
Question : The measure of central tendency listed below is:
(a) The raw score
(b) The mean
(c) The range
(d) Standard deviation
Answer : B 
 
Question : The total of all the observations divided by the number of observations is called:
(a) Arithmetic mean
(b) Geometric mean
(c) Median
(d) Harmonic mean
Answer : A 
 
Question : While computing the arithmetic mean of a frequency distribution, the each value of a class is considered equal to:
(a) Class mark
(b) Lower limit
(c) Upper limit
(d) Lower class boundary
Answer : B  
 
Question : Change of origin and scale is used for calculation of the:
(a) Arithmetic mean
(b) Geometric mean
(c) Weighted mean
(d) Lower and upper quartiles
Answer : A  
 
Question : The sample mean is a:
(a) Parameter
(b) Statistic
(c) Variable
(d) Constant
Answer : B  
 
Question : The population mean μ is called:
(a) Discrete variable
(b) Continuous variable
)c) Parameter
(d) Sampling unit
Answer : C 
 
Question : The arithmetic mean is highly affected by:
(a) Moderate values
(b) Extremely small values
(c) Odd values
(d) Extremely large values
Answer : D
 
 Question :

X

Answer : D
 
Question :If a constant value is added to every observation of data, then arithmetic mean is obtainedby:
(a) Subtracting the constant
(b) Adding the constant
(c) Multiplying the constant
(d) Dividing the constant
Answer : B
 
Question :Which of the following statements is always true?
(a) The mean has an effect on extreme scores
(b) The median has an effect on extreme scores
(c) Extreme scores have an effect on the mean
(d) Extreme scores have an effect on the median
Answer : C
 
Question : The elimination of extreme scores at the bottom of the set has the effect of:
(a) Lowering the mean
(b) Raising the mean
(c) No effect
(d) None of the above
Answer : B
 
Question : The elimination of extreme scores at the top of the set has the effect of:
(a) Lowering the mean
(b) Raising the mean
(c) No effect
(d) Difficult to tell
Answer : A
 
Question : The sum of deviations taken from mean is:
(a) Always equal to zero
(b) Some times equal to zero
(c) Never equal to zero
(d) Less than zero
Answer : A
 
Question : The sum of the squares fo the deviations about mean is:
(a) Zero
(b) Maximum
(c) Minimum
(d) All of the above
Answer : C
 
Question :
 
Xy
Answer : B
 
Question :
 
Xy-
(a) 10
(b) 50
(c) 60
(d) 100
Answer : C
 
Question : 
Xy-1
(a) 20
(b) 25
(c) -25
(d) 35
Answer : B 
 
Question : The sum of the squares of the deviations of the values of a variable is least when the deviations are measured from:
(a) Harmonic mean
(b) Geometric mean
(c) Median
(d) Arithmetic mean
Answer : D 
 
Question :
Xy-2
 
Answer : C
 
 
Question :
 
Xy-3
(a) 0
(b) 2
(c) 100
(d) 200
Answer : A
 
Question : Step deviation method or coding method is used for computation of the:
(a) Arithmetic mean
(b) Geometric mean
(c) Weighted mean
(d) Harmonic mean
Answer : A
 
 
Question : If the arithmetic mean of 20 values is 10, then sum of these 20 values is:
(a) 10
(b) 20
(c) 200
(d) 20 + 10
Answer : C
 
Question : Ten families have an average of 2 boys. How many boys do they have together?
(a) 2
(b) 10
(c) 12
(d) 20
Answer : D
 
Question : If the arithmetic mean of the two numbers X1 and X2 is 5 if X1=3, then X2 is:
(a) 3
(b) 5
(c) 7
(d) 10
Answer : C
 
Question : Given X1=20 and X2= -20. The arithmetic mean will be:
(a) Zero
(b) Infinity
(c) Impossible
(d) Difficult to tell
Answer : A
 
Question : The mean of 10 observations is 10. All the observations are increased by 10%. The mean of increased observations will be:
(a) 10
(b) 1.1
(c) 10.1
(d) 11
Answer : D
 
Question : The frequency distribution of the hourly wage rate of 60 employees of a paper mill is as follows:
 
 Xy-4
 
The mean wage rate is:
(a) Rs. 58.60
(b) Rs. 59.00
(c) Rs. 57.60
(d) Rs. 57.10
Answer : B
 
Question : The mean of first 2n natural numbers is:
Xy-5
Answer : C
 
Question : The sum of deviations is zero when deviations are taken from:
(a) Mean
(b) Median
(c) Mode
(d) Geometric mean
Answer : A
 
Question : When the values in a series are not of equal importance, we calculate the:
(a) Arithmetic mean
(b) Geometric mean
(c) Weighted mean
(d) Mode
Answer : C
 
Question : When all the values in a series occur the equal number of times, then it is not possible to calculate the:
(a) Arithmetic mean
(b) Geometric mean
(c) Harmonic mean
(d) Weighted mean
Answer : D
 
Question : The mean for a set of data obtained by assigning each data value a weight that reflects its relative importance within the set, is called:
(a) Geometric mean
(b) Harmonic mean
(c) Weighted mean
(d) Combined mean
Answer : C 
 
Question : The arithmetic mean of 10 items is 4 and the arithmetic mean of 5 items is 10. The combined arithmetic mean is:
(a) 4
(b) 5
(c) 6
(d) 90
Answer : C
 
Question : The midpoint of the values after they have been ordered from the smallest to the largest or the largest to the smallest is called:
(a) Mean
(b) Median
(c) Lower quartile
(d) Upper quartile
Answer : B
 
Question : The first step in calculating the median of a discrete variable is to determine the:
(a) Cumulative frequencies
(b) Relative weights
(c) Relative frequencies
(d) Array
Answer : D
 
Question : The suitable average for qualitative data is:
(a) Mean
(b) Median
(c) Mode
(d) Geometric mean
Answer : B
 
Question : Extreme scores will have the following effect on the median of an examination:
(a) They may have no effect on it
(b) They may tend to raise it
(c) They may tend to lower it
(d) None of the above
Answer : A 
 
Question : We must arrange the data before calculating:
(a) Mean
(b) Median
(c) Mode
(d) Geometric mean
Answer : B
 
Question :  If the smallest observation in a data is decreased, the average which is not affected is:
(a) Mode
(b) Median
(c) Mean
(d) Harmonic mean
Answer : B
 
Question : If the data contains an extreme value, the suitable average is:
(a) Mean
(b) Median
(c) Weighted mean
(d) Geometric mean
Answer : B
 
Question : Sum of absolute deviations of the values is least when deviations are taken from:
(a) Mean
(b) Mode
(c) Median
(d) Q3
Answer : C 
 
Question : The values of the variate that divide a set of data into four equal parts after arranging the observations in ascending order of magnitude are called:
(a) Quartiles
(b) Deciles
(c) Percentiles
(d) Difficult to tell
Answer : A
 
Question : The lower and upper quartiles of a symmetrical distribution are 40 and 60 respectively. The value of median is:
(a) 40
(b) 50
(c) 60
(d) (60 – 40) / 2
Answer : B
 
Question : If in a discrete series 75% values are less than 30, then:
(a) Q3 < 75
(b) Q3 < 30
(c) Q3 = 30
(d) Q3 > 30
Answer : C
 
Question : If in a discrete series 75% values are greater than 50, then:
(a) Q1 = 50
(b) Q1 < 50
(c) Q1 > 50
(d) Q1 ≠ 50
Answer : A
 
Question : If in a discrete series 25% values are greater than 75, then:
(a) Q1 > 75
(b) Q1 = 75
(c) Q3 = 75
(d) Q3 > 75
Answer : C
 
Question : If in a discrete series 40% values are less than 40, then :
(a) D4 ≠ 40
(b) D4 < 40
(c) D4 > 40
(d) D4 = 40
Answer : D
 
Question : If in a discrete series 15% values are greater than 40, then:
(a) P15 = 70
(b) P85 = 15
(c) P85 = 70
(d) P70 = 70
Answer : C
 
Question : The middle value of an ordered series is called:
(a) Median
(b) 5th decile
(c) 50th percentile
(d) All the above
Answer : D
 
Question : If in a discrete series 50% values are less than 50, then:
(a) Q2 = 50
(b) D5 = 50
(c) P50 = 50
(d) All of the above
Answer : D
 
Question : The mode or model value of the distribution is that value of the variate for which frequency is:
(a) Minimum
(b) Maximum
(c) Odd number
(d) Even number
Answer : B
 
Question : Suitable average for averaging the shoe sizes for children is:
(a) Mean
(b) Mode
(c) Median
(d) Geometric mean
Answer : B
 
Question : Extreme scores on an examination have the following effect on the mode:
(a) They tend to raise it
(b) they tend to lower it
(c) They have no effect on it
(d) difficult to tell
Answer : C
 
Question : A measurement that corresponds to largest frequency in a set of data is called:
(a) Mean
(b) Median
(c) Mode
(d) Percentile
Answer : C
 
Question : Which of the following average cannot be calculated for the observations 2, 2, 4, 4, 6, 6, 8, 8, 10, 10 ?
(a) Mean
(b) Median
(c) Mode
(d) All of the above
Answer : C
 
Question : Mode of the series 0, 0, 0, 2, 2, 3, 3, 8, 10 is:
(a) 0
(b) 2
(c) 3
(d) No mode
Answer : A
 
Question : A distribution with two modes is called:
(a) Unimodel
(b) Bimodal
(c) Multimodal
(d) Normal
Answer : B
 
Question : The model letter of the word “STATISTICS” is:
(a) S
(b) T
(c) Both S and I
(d) Both S and T
Answer : D 
 
Question : Which of the following statements is always correct?
(a) Mean = Median = Mode
(b) Arithmetic mean = Geometric mean = Harmonic mean
(c) Median = Q2 = D5 = P50
(d) Mode = 2Median - 3Mean
Answer : C
 
Question : In a moderately symmetrical series, the arithmetic mean, median and mode are related as:
(a) Mean - Mode = 3(Mean - Median)
(b) Mean - Median = 2(Median - Mode)
(c) Median - Mode = (Mean - Median) / 2
(d) Mode – Median = 2Mean – 2Median
Answer : A
 
Question : In a moderately skewed distribution, mean is equal to!
(a) (3Median - Mode) / 2
(b) (2Mean + Mode) / 3
(c) 3Median – 2Mean
(d) 3Median - Mode
Answer : A
 
Question : In a moderately asymmetrical distribution, the value of median is given by:
(a) 3Median + 2Mean
(b) 2Mean + Mode
(c) (2Mean + Mode) / 3
(d) (3Median - Mode) / 2
Answer : C
 
Question : For moderately skewed distribution, the value of mode is calculated as:
(a) 2Mean – 3Median
(b) 3Median – 2Mean
(c) 2Mean + Mode
(d) 3Median - Mode
Answer : B
 
Question : In a moderately skewed distribution, Mean = 45 and Median = 30, then the value of mode is:
(a) 0
(b) 30
(c) 45
(d) 180
Answer : A
 
Question : If for any frequency distribution, the median is 10 and the mode is 30, then approximate value of mean is equal to:
(a) 0
(b) 10
(c) 30
(d) 60
Answer : A
 
Question : In a moderately asymmetrical distribution, the value of mean and mode is 15 and 18 respectively. The value of median will be:
(a) 48
(b) 18
(c) 16
(d) 15
Answer : C
 
Question : Which of the following is correct in a positively skewed distribution?
(a) Mean = Median = Mode
(b) Mean < Median < Mode
(c) Mean > Median > Mode
(d) Mean + Median + Mode
Answer :  C 
 
Question : If the values of mean, median and mode coincide in a unimodel distribution, then the distribution will be:
(a) Skewed to the left
(b) Skewed to the right
(c) Multimodal
(d) Symmetrical
Answer :  D 
 
Question : A curve that tails off to the right end is called:
(a) Positively skewed
(b) Negatively skewed
(c) Symmetrical
(d) Both (b) and (c)
Answer :  A 
 
Question : The sum of the deviations taken from mean is:
(a) Always equal to zero
(b) Some times equal to zero
(c) Never equal to zero
(d) Less than zero
Answer :  D
 
Question :  If a set of data has one mode and its value is less than mean, then the distribution is called:
(a) Positively skewed
(b) Negatively skewed
(c) Symmetrical
(d) Normal
Answer :  A
 
Question : Taking the relevant root of the product of all non-zero and positive values are called:
(a) Arithmetic mean
(b) Geometric mean
(c) Harmonic mean
(d) Combined mean
Answer :  B
 
Question : The best average in percentage rates and ratios is:
(a) Arithmetic mean
(b) Lower and upper quartiles
(c) Geometric mean
(d) Harmonic mean
Answer :  C
 
Question : The suitable average for computing average percentage increase in population is:
(a) Geometric mean
(b) Harmonic mean
(c) Combined mean
(d) Population mean
Answer :  A
 
Question : If 10% is added to each value of variable, the geometric mean of new variable is added by:
(a) 10
(b) 1/100
(c) 10%
(d) 1.1
Answer :  C
 
Question : If each observation of a variable X is increased by 20%, then geometric mean is also increased by:
(a) 20
(b) 1/20
(c) 20%
(d) 100%
Answer :   C
 
Question : If any value in a series is negative, then we cannot calculate the:
(a) Mean
(d) Median
(c) Geometric mean
(d) Harmonic mean
 Answer :  C
 
Question : Geometric mean of 2, 4, 8 is:
(a) 6
(b) 4
(c) 14/3
(d) 8
Answer : B
 
Question : Geometric mean is suitable when the values are given as:
(a) Proportions
(b) Ratios
(c) Percentage rates
(d) All of the above
Answer : D
 
Question : If the geometric of the two numbers X1 and X2 is 9 if X1=3, then X2 is equal to:
(a) 3
(b) 9
(c) 27
(d) 81
Answer : C
 
Question : If the two observations are a = 2 and b = -2, then their geometric mean will be:
(a) Zero
(b) Infinity
(c) Impossible
(d) Negative
Answer : C
 
Question : Geometric mean of -4, -2 and 8 is:
(a) 4 (b) 0
(c) -2 (d) Impossible
Answer : D
 
Question : The ratio among the number of items and the sum of reciprocals of items is called:
(a) Arithmetic mean
(b) Geometric mean
(c) Harmonic mean
(d) Mode
Answer : C 
 
Question : The appropriate average for calculating the average speed of a journey is:
(a) Median
(b) Arithmetic mean
(c) Mode
(d) Harmonic mean
Answer :  D 
 
Question : Harmonic mean gives less weightage to:
(a) Small values
(b) Large values
(c) Positive values
(d) Negative values
Answer :  B
 
Question : The harmonic mean of the values 5, 9, 11, 0, 17, 13 is:
(a) 9.5
(b) 6.2
(c) 0
(d) Impossible
Answer :  D
 
Question : If the harmonic mean of the two numbers X1 and X2 is 6.4 if X2=16, then X1 is:
(a) 4
(b) 10
(c) 16
(d) 20
Answer : A 
 
Question : If a = 5 and b = -5, then their harmonic mean is:
(a) -5
(b) 5
(c) 0
(d) ∞
Answer : D 
 
Question : For an open-end frequency distribution, it is not possible to find:
(a) Arithmetic mean
(b) Geometric mean
(c) Harmonic mean
(d) All of the above
Answer : D 
 
Question : If all the items in a variable are non zero and non negative then:
(a) A.M > G.M > H.M
(b) G.M > A.M > H.M
(c) H.M > G.M > A.M
(d) A.M < G.M < H.M
Answer : A
 
Question : The geometric mean of a set of positive numbers X1, X2, X3, ... , Xn is less than or equal to their arithmetic mean but is greater than or equal to their:
(a) Harmonic mean
(b) Median
(c) Mode
(d) Lower and upper quartiles
Answer : A
 
Question : Geometric mean and harmonic mean for the values 3, -11, 0, 63, -14, 100 are:
(a) 0 and 3
(b) 3 and -3
(c) 0 and 0
(d) Impossible
Answer : D
 
Question : If the arithmetic mean and harmonic mean of two positive numbers are 4 and 16, then their geometric mean will be:
(a) 4
(b) 8
(c) 16
(d) 64
Answer : B
 
Question : The arithmetic mean and geometric mean of two observations are 4 and 8 respectively, then harmonic mean of these two observations is:
(a) 4
(b) 8
(c) 16
(d) 32
Answer : A
 
Question : The geometric mean and harmonic mean of two values are. 8 and 16 respectively, then arithmetic mean of values is:
(a) 4
(b) 16
(c) 24
(d) 128
Answer : B
 
Question : Which pair of averages cannot be calculated when one of numbers in the series is zero?
(a) Geometric mean and Median
(b) Harmonic mean and Mode
(c) Simple mean and Weighted mean
(d) Geometric mean and Harmonic mean
Answer : D
 
Question : In a given data the average which has the least value is:
(a) Mean
(b) Median
(c) Harmonic mean
(d) Geometric mean
Answer : C
 
Question : If all the values in a series are same, then:
(a) A.M = G.M = H.M
(b) A.M ≠ G.M ≠ H.M
(c) A.M > G.M > H.M
(d) A.M < G.M < H.M
Answer : A
 
Question : The averages are affected by change of:
(a) Origin
(b) Scale
(c) Both (a) and (b)
(d) None of the above
Answer :  C
 
 Question : Harmonic mean for X1 and X2 is:
Xy-12
Answer : B
 
Question : Geometric mean for X1 and X2 is:
 Xy-11
Answer : B
 
 
 
Question : The mode for the following frequency distribution is:

 

Xy-9

(a) 0
(b) 2
(c) 3
(d) No mode

Answer : C

Question :

Xy-10

(a) 2
(b) 3
(c) 1/2
(d) 1/3

Answer : A

Question : The frequency distribution of the hourly wages rate of 100 employees of a paper mill is as follows:
Xy-8
 
 
The median wage rate is:
(a) Rs.55
(b) Rs.57
(c) Rs.56
(d) Rs.59
Answer : D
 
 
Question :

 

Xy-6
Answer : C
 
Question : The combined arithmetic mean is calculated by the formula:
Xy-7
Answer : C

 

ONE MARK QUESTIONS

Question. What is meant by central tendency?.
Answer: A Single figure that represents the whole series is known as central tendency.

Question. What are the types of mean?.
Answer: There are two types of mean - simple and weighted.

Question. Name any two partition values.
Answer: (i) Quartile (ii) Decile (iii) Percentile

Question. Give the meaning of arithmatic average.
Answer: When the sum of all items is divided by their number is known as arithmatic average.

Question. Define mode.
Answer: The value which occurs most frequently in series is known as mode.

Question. Pocket money of 8 students is Rs. 6,12,18, 24, 30, 36, 42 and 48, calculate mean.
Answer:  
cbse-class-11-economics-measures-of-central-tendency-assignment

Question. Write the formula for weighted mean.
Answer:  
cbse-class-11-economics-measures-of-central-tendency-assignment

Question. What is the relation among the mean, median and mode?
Answer: Mode = 3 median - 2 mean

Question. Which partition value divide the total set of values into four equal parts.
Answer: Quartile

Question. Give the meaning of combined mean.
Answer: When the mean of two or more than two series is computed collectively, it is known as combined mean.

Question. A shoes manufacturing company only manufactures shoes for adults. Company wants to know the most popular size. Which type of central tendency will be the most appropriate?
Answer: Mode

Question. Which diagram is used for finding the value of mode graphically?
Answer: Histogram

Question. Mention one demerit of mode.
Answer: One demerit of mode is that it is not capable of algebraic treatment.

Question. If the values of mean and median are 40 and 48. Find out the most probable value of mode.
Answer: Mode = 3 median - 2 mean
= (3x 48) - (2 x 40) = 144 - 80
= 64

Question. Calculate mode from the following data 10, 8, 10, 6, 4, 12, 10, 8, 10, 18, 16, 10, 18, 10, 10.
Answer: Mode = 10

Question. How is the value of median computed with the help of ogive curves?.
Answer: The point of intersection where ‘less than’ ogive curve and ‘morethan’ ogive curve intersect each other gives us the value of mediam. 

Question. What is positional average?
Answer: Those averages whose value is worked out on the basis of their position in the statistical series.

Question. What is the sum of deviations taken from mean in a series.
Answer: Zero.

 

MARKS QUESTIONS

1. Give four objectives of statistical average.

2. Show that the sum of deviations of the values of the variable from their arithmatic mean is equal to zero.

3. Write the merits of median.

4. Calculate median from the following data

 CBSE Class 11 Economics Measures Of Central Tendency

5. State three advantages of mode.

6. What are four demerits of mean.

7. Average income of 50 families is Rs. 3000. Average income of 12 families is Rs. 18000. Find the average income of rest of the families (Ans. 3378.95)

8. What are the essentials of a good average.

9. Mean marks obtained by a student in his five subjects are 15 in english he secures 8 marks, in economics 12, in mathematics 18 and in commerce 9, Find out the marks he secured in statisties.

10. What is meant by weighted arithmatic mean? How is it calculated?.

11. Name and define three statistical averages.

12. State any two reasons of difference between median and mode.

13. Explain the characterstics, merits and demerits of mean.

Indian Economic Development Chapter 01 Indian Economy on the Eve of Independence
CBSE Class 11 Economics Indian Economy on the Eve of Independence Assignment
Indian Economic Development Chapter 02 Indian Economy 1950-1990
CBSE Class 11 Economics Agriculture Assignment
Indian Economic Development Chapter 03 Liberalisation, Privatisation and Globalisation: An Appraisal
CBSE Class 11 Economics Economic Reforms Since 1991 Assignment
Indian Economic Development Chapter 04 Poverty
CBSE Class 11 Economics Poverty Assignment
Indian Economic Development Chapter 05 Human Capital Formation In India
CBSE Class 11 Economics Human Capital Formation in India Assignment
Indian Economic Development Chapter 06 Rural Development
CBSE Class 11 Economics Rural Development Assignment
Indian Economic Development Chapter 07 Employment Growth Informalisation and Other Issues
CBSE Class 11 Economics Growth Informalisation Assignment
Indian Economic Development Chapter 08 Infrastructure
CBSE Class 11 Economics Infrastructure Assignment
Indian Economic Development Chapter 09 Environment and Sustainable Development
CBSE Class 11 Economics Environment and Sustainable Development Assignment
Indian Economic Development Chapter 10 Comparative Development Experiences Of India and Its Neighbours
CBSE Class 11 Economics Development Experience of India Assignment
Statistics for Economics Chapter 01 Introduction
CBSE Class 11 Economics Introduction Assignment
Statistics for Economics Chapter 02 Collection of Data
CBSE Class 11 Economics Collection of Data Assignment
Statistics for Economics Chapter 03 Organisation of Data
CBSE Class 11 Economics Organisation and Presentation of Data Assignment
Statistics for Economics Chapter 04 Presentation of Data
CBSE Class 11 Economics Presentation of Data Assignment
Statistics for Economics Chapter 05 Measures of Central Tendency
CBSE Class 11 Economics Measures Of Central Tendency Assignment
Statistics for Economics Chapter 06 Measures of Dispersion
CBSE Class 11 Economics Measures Of Dispersion Assignment
Statistics for Economics Chapter 07 Correlation
CBSE Class 11 Economics Correlation Assignment
Statistics for Economics Chapter 08 Index Numbers
CBSE Class 11 Economics Introduction to index numbers Assignment
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CBSE Class 11 Economics Averages Assignment
CBSE Class 11 Economics Diagrammatic Presentation Assignment
CBSE Class 11 Economics Economic planning Assignment
CBSE Class 11 Economics Inflation Problems and Policies Assignment

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CBSE Class 11 Economics Statistics For Economics Chapter 5 Measures Of Central Tendency Assignment

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