CBSE Class 11 Organisation of Data MCQs Set A

Question : The characteristic of a fact that can be measured in the form of numbers is called:
(a) frequency
(b) variable
(c) attribute
(d) none of these

Answer :  B

Question : Frequency of a variable is always:
(a) A fraction
(b) In percentage
(c) An integer
(d) None of these

Answer :  C

Question :  A series showing the sets of all values in classes with their corresponding frequencies is known as:

(a) Grouped frequency distribution
(b) Cumulative frequency distribution
(c) Simple frequency distribution
(d) None of the above

Answer :  A

Question : A series in which every class interval excludes items corresponding to its upper limit is called:
(a) exclusive series
(b) inclusive series
(c) both (a) and (b)
(d) none of these

Answer :  A
 

Question : An open-end series is that series in which:
(a) lower limit of the first class interval is missing
(b) upper limit of the last class interval is missing
(c) both (a) and (b)
(d) none of these

Answer :  C

Question : According to tally bar method, which of the following symbols indicate the frequency of five?
(a) IIII
(b) II
(c) III
(d) None of these

Answer :  D

Question : The Frequency distribution of a continuous variable is known as:
(a) Grouped frequency distribution
(b) Simple frequency distribution
(c) Either (a) or (b)
(d) Both (a) and (b)

Answer :  A
 

Question : In an ordered series, the data are:
(a) In descending order
(b) In ascending order
(c) Either (a) or (b)
(d) None of these

Answer :  C
 

Question : In a series, the number of times an item occurs is known as:
(a) number
(b) class frequency
(c) frequency
(d) cumulative frequency

Answer :  C
 

Question : The difference between upper limit and lower limit of a class is known as:
(a) range
(b) magnitude of a class interval
(c) frequency
(d) class limits

Answer :  B

Question : Which of the following equations is correct?
(a) s = r + n
(b) s = r - n
(c) s = r × n
(d) s = rn
[s = Size of the class; r = Range; n = Number of classes]

Answer :  D

Question : Drinking habit of a person is:
(a) An attribute
(b) A discrete variable
(c) A variable
(d) A continuous variable

Answer :  A

Question : An attribute is:
(a) A qualitative characteristic
(b) A measurable characteristic
(c) A quantitative characteristic
(d) All these

Answer :  A

Question : Nationality of a student is:
(a) An attribute
(b) A discrete variable
(c) A continuous variable
(d) Either (a) or (c)

Answer :  A

Question : Why is it true that classes in frequency distributions are all inclusive`
(a) No data point falls into more than one class
(b) There are always more classes than data point
(c) All data fit into one class or another
(d) All of these

Answer :  C
 

Question : The value exactly at the middle of a class-interval is called:
(a) Class mark
(b) Mid-value
(c) Both (a) and (b)
(d) None of these

Answer :  C
 

Question : The lower-class boundary is:
(a) An upper limit to Lower Class Limit
(b) A Lower limit to Lower Class Limit
(c) Both (a) and (b)
(d) None of these

Answer :  B
 

Question : Mutually exclusive classification is usually meant for:
(a) An attribute
(b) A continuous variable
(c) A discrete variable
(d) Any of these

Answer :  B
 

Question : For the construction of a grouped frequency distribution, we take:
(a) Class boundaries
(b) Class limits
(c) Both (a) and (b)
(d) None of these

Answer :  B

Question : Tally marks determines:
(a) Class width
(b) Class boundary
(c) Class limit
(d) Class frequency

Answer :  A
 

Question : The number of observations falling within a class is called:
(a) Density
(b) Frequency
(c) Both (a) and (b)
(d) None of these

Answer : B

Question : Which of the following is the objective of classification?
(a) Simplification
(b) Briefness
(c) Comparability
(d) All of these

Answer :  D
 

Question : Classification of data on the basis of time period is called:
(a) geographical classification
(b) chronological classification
(c) qualitative classification
(d) quantitative classification

Answer :  B
 

Question : A series showing the sets of all distinct values individually with their frequencies is known as:
(a) Grouped frequency distribution
(b) Simple frequency distribution
(c) Cumulative frequency distribution
(d) None of these

Answer :  B
 

Question : Annual income of a person is:
(a) A continuous variable
(b) A discrete variable
(c) An attribute
(d) Either (b) or (c)

Answer :  B
 

Question : Upper limit of any class is:
(a) Same
(b) Different
(c) Both (a) and (b)
(d) None of these

Answer :  B
 

Question : In inclusive class-intervals of a frequency distribution:
(a) Upper limit of each class-interval is included
(b) Lower limit of each class-interval is included
(c) Both (a) and (b)
(d) None of these

Answer :  C
 

Question : In exclusive class intervals of a frequency distribution:
(a) Upper limit of each class-interval is excluded
(b) Lower limit of each class-interval is excluded
(c) Both (a) and (b)
(d) None of these

Answer :  A
 

Question : For determining the class frequencies, it is necessary that these classes are:
(a) Mutually exclusive
(b) Not mutually exclusive
(c) Independent
(d) None of these

Answer :  A

Question : The upper limit of class-intervals is considered for calculating:
(a) ‘Less than’ cumulative frequency
(b) ‘More than’ cumulative frequency
(c) Relative frequency
(d) None of these

Answer :  A
 

Question : In an individual series, each variate value has:
(a) Same frequency
(b) Frequency one
(c) Varied frequency
(d) Frequency two

Answer :  B
 

Question : A grouped frequency distribution with uncertain first or last class is known as:
(a) Exclusive class distribution
(b) Inclusive class distribution
(c) Open end distribution
(d) Discrete frequency distribution

Answer :  B

Question : Class-interval is measured as:
(a) Half of the sum of lower and upper limit
(b) The sum of the upper and lower limit
(c) Half of difference between upper and lower limit
(d) The difference between upper and lower limit

Answer :  D
 

Question : The data given as 5, 7,12,17, 79, 84, 91 will be called as:
(a) A continuous series
(b) A discrete series
(c) An individual series
(d) Time series

Answer :  C
 

Question : Most extreme values which are never included in a class-interval are called:
(a) Class-interval
(b) Class limits
(c) Cass boundaries
(d) None of these

Answer :  C
 

Question : The class marks of a distribution are 26, 31,36, 41,46 and 51. Then the first-class interval is:
(a) 23.5-28.5
(b) 23-28
(c) 22.5-27.5
(d) None of these

Answer :  A

Question : Mutually exclusive classification:
(a) Excludes the upper-class limit but includes the lower-class limit
(b) Excludes both the class limits
(c) Includes the upper-class limit but excludes the upper-class limit
(d) Either (b) or (c)

Answer :  B
 

Question : In the construction of a frequency distribution, it is generally preferable to have classes of
(a) Equal width
(b) Unequal width
(c) Maximum width
(d) None of these

Answer :  A
 

Question : Classes with zero frequencies are called:
(a) Class
(b) Empty class
(c) Nil class
(d) None of these

Answer :  B
 

Question : For the mid-values given: 25, 34, 43, 53, 61,70, the first class of the distribution is:
(a) 25-34
(b) 24.5-34.5
(c) 20-30
(d) 20.5-29.5

Answer :  D