CBSE Class 9 Mathematics Statistics Assignment Set C

Read and download free pdf of CBSE Class 9 Mathematics Statistics Assignment Set C. Get printable school Assignments for Class 9 Mathematics. Class 9 students should practise questions and answers given here for Chapter 14 Statistics Mathematics in Class 9 which will help them to strengthen their understanding of all important topics. Students should also download free pdf of Printable Worksheets for Class 9 Mathematics 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 9 Mathematics Chapter 14 Statistics

Class 9 Mathematics students should refer to the following printable assignment in Pdf for Chapter 14 Statistics in Class 9. This test paper with questions and answers for Class 9 Mathematics will be very useful for exams and help you to score good marks

Chapter 14 Statistics Class 9 Mathematics Assignment

 

 Statistics

Statistics

Statistics 

 
 
 
Question :  The following number of goals was scored by a team in a series of 10 matches: 2, 3, 4, 5, 0, 1, 3, 3, 4, 3 Find the mean, median and mode of these scores.
Answer:  The number of goals scored by the team is
2, 3, 4, 5, 0, 1, 3, 3, 4, 3
C-43
Arranging the number of goals in ascending order,
0, 1, 2, 3, 3, 3, 3, 4, 4, 5
The number of observations is 10, which is an even number. Therefore, median
C-44
 
Mode of data is the observation with the maximum frequency in data.
Therefore, the mode score of data is 3 as it has the maximum frequency as 4 in the data.
 
Question : In a mathematics test given to 15 students, the following marks (out of 100) are recorded:
41, 39, 48, 52, 46, 62, 54, 40, 96, 52, 98, 40, 42, 52, 60 Find the mean, median and mode of this data. 
Answer:  The marks of 15 students in mathematics test are 41, 39, 48, 52, 46, 62, 54, 40, 96, 52, 98, 40, 42, 52, 60
C-45
Arranging the scores obtained by 15 students in an ascending order,
39, 40, 40, 41, 42, 46, 48, 52, 52, 52, 54, 60, 62, 96, 98
As the number of observations is 15 which is odd, therefore, the median of data will be  15 + 1/ 2 = 8th observation whether the data is arranged in an ascending or descending order.
Therefore, median score of data = 52
Mode of data is the observation with the maximum frequency in data. Therefore, mode
of this data is 52 having the highest frequency in data as 3.
 
Question : The following observations have been arranged in ascending order. If the median of the data is 63, find the value of x.
29, 32, 48, 50, x, x + 2, 72, 78, 84, 95
Answer:  It can be observed that the total number of observations in the given data is 10 (even number).
Therefore, the median of this data will be the mean of  10/2 i.e., 5th
 
 C-46
 
 
Question : Find the mode of 14, 25, 14, 28, 18, 17, 18, 14, 23, 22, 14, 18.
Answer:  Arranging the data in an ascending order,
14, 14, 14, 14, 17, 18, 18, 18, 22, 23, 25, 28
It can be observed that 14 has the highest frequency, i.e. 4, in the given data.
Therefore, mode of the given data is 14.
 
Question : Find the mean salary of 60 workers of a factory from the following table:
 
C-47
C-48
 
Answer: 
C-49
 
 
Question : Give one example of a situation in which
(i) The mean is an appropriate measure of central tendency. 
(ii) The mean is not an appropriate measure of central tendency but the median is an appropriate measure of central tendency.
Answer:  When any data has a few observations such that these are very far from the other observations in it, it is better to calculate the median than the mean of the data as median gives a better estimate of average in this case.
(i) Consider the following example − the following data represents the heights of the members of a family.
154.9 cm, 162.8 cm, 170.6 cm, 158.8 cm, 163.3 cm, 166.8 cm, 160.2 cm In this case, it can be observed that the observations in the given data are close to each other. Therefore, mean will be calculated as an appropriate measure of central tendency.
(ii) The following data represents the marks obtained by 12 students in a test.
48, 59, 46, 52, 54, 46, 97, 42, 49, 58, 60, 99
In this case, it can be observed that there are some observations which are very far from other observations. Therefore, here, median will be calculated as an appropriate measure of central tendency. 
 
 

Question : 100 surnames were randomly picked up from a local telephone directory and a frequency distribution of the number of letters in the English alphabet in the surnames was found as follows:

CBSE Class 9 Mathematics Statistics Assignment Set C

(i) Draw a histogram to depict the given information.
(ii) Write the class interval in which the maximum number of surname lie.
Answer:

(i) Here, it can be observed that the data has class intervals of varying width. The proportion of the number of surnames per 2 letters interval can be calculated as follows.
CBSE Class 9 Mathematics Statistics Assignment Set C-

By taking the number of letters on x-axis and the proportion of the number of surnames per 2 letters interval on y-axis and choosing an appropriate scale (1 unit = 4 students for y axis), the histogram can be constructed as follows.

CBSE Class 9 Mathematics Statistics Assignment Set C-1

 

(ii) The class interval in which the maximum number of surnames lies is 6 − 8 as it has 44 surnames in it i.e., the maximum for this data.

 

Question : In a mathematics test given to 15 students, the following marks (out of 100) are recorded:
41, 39, 48, 52, 46, 62, 54, 40, 96, 52, 98, 40, 42, 52, 60 Find the mean, median and mode of this data.
Answer:

The marks of 15 students in mathematics test are
41, 39, 48, 52, 46, 62, 54, 40, 96, 52, 98, 40, 42, 52, 60

CBSE Class 9 Mathematics Statistics VBQs-1

 

Arranging the scores obtained by 15 students in an ascending order,
39, 40, 40, 41, 42, 46, 48, 52, 52, 52, 54, 60, 62, 96, 98
As the number of observations is 15 which is odd, therefore, the median of data will be 15+1/2 = 8th observation whether the data is arranged in an ascending or descending order.
Therefore, median score of data = 52
Mode of data is the observation with the maximum frequency in data. Therefore, mode of this data is 52 having the highest frequency in data as 3.

 

Question : Find the mode of 14, 25, 14, 28, 18, 17, 18, 14, 23, 22, 14, 18.
Answer:

Arranging the data in an ascending order,
14, 14, 14, 14, 17, 18, 18, 18, 22, 23, 25, 28
It can be observed that 14 has the highest frequency, i.e. 4, in the given data.
Therefore, mode of the given data is 14.

 

Question : Give one example of a situation in which
(i) The mean is an appropriate measure of central tendency.
(ii) The mean is not an appropriate measure of central tendency but the median is an appropriate measure of central tendency.
Answer:

When any data has a few observations such that these are very far from the other observations in it, it is better to calculate the median than the mean of the data as median gives a better estimate of average in this case.
(i) Consider the following example − the following data represents the heights of the members of a family.
154.9 cm, 162.8 cm, 170.6 cm, 158.8 cm, 163.3 cm, 166.8 cm, 160.2 cm In this case, it can be observed that the observations in the given data are close to each other. Therefore, mean will be calculated as an appropriate measure of central tendency.
(ii) The following data represents the marks obtained by 12 students in a test.
48, 59, 46, 52, 54, 46, 97, 42, 49, 58, 60, 99
In this case, it can be observed that there are some observations which are very far from other observations. Therefore, here, median will be calculated as an appropriate measure of central tendency.

 

Click on link below to download CBSE Class 9 Mathematics Statistics Assignment Set C

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CBSE Class 9 Mathematics Chapter 14 Statistics Assignment

We hope you liked the above assignment for Chapter 14 Statistics which has been designed as per the latest syllabus for Class 9 Mathematics released by CBSE. Students of Class 9 should download and practice the above Assignments for Class 9 Mathematics regularly. We have provided all types of questions like MCQs, short answer questions, objective questions and long answer questions in the Class 9 Mathematics practice sheet in Pdf. All questions have been designed for Mathematics by looking into the pattern of problems asked in previous year examinations. 

Assignment for Mathematics CBSE Class 9 Chapter 14 Statistics

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Chapter 14 Statistics Assignment Mathematics CBSE Class 9

All questions and their answers for the assignment given above for Class 9 Mathematics have been developed as per the latest curriculum and books issued for the current academic year. The students of Class 9 can rest assured that the best teachers have designed the questions of Mathematics so that you are able to revise the entire syllabus if you do the assignments. Lot of MCQ questions for Class 9 Mathematics have also been given in the worksheets and assignments for regular use. All study material for Class 9 Mathematics students have been given on studiestoday.

Chapter 14 Statistics Assignment CBSE Class 9 Mathematics

Regular assignment practice helps to get a more comprehensive understanding of Chapter 14 Statistics concepts. Assignments play a crucial role in understanding Chapter 14 Statistics in CBSE Class 9. Students can download all the assignments of the same chapter in Class 9 Mathematics in Pdf format. You can print them or read them online on your computer or mobile.

CBSE Mathematics Class 9 Chapter 14 Statistics Assignment

CBSE Class 9 Mathematics latest books have been used for coming up with the latest questions and solutions for the above assignment. If you have revised all concepts relating to Chapter 14 Statistics then you should attempt all questions given in the test sheets above. We have also provided lot of Worksheets for Class 9 Mathematics which you can use to further make your self stronger in Mathematics

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The Chapter 14 Statistics Class 9 Mathematics Assignments have been designed based on latest CBSE syllabus for Class 9 Mathematics issued for the current academic year

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