Statistics Class 9 Worksheets

Statistics Class 9 Worksheets

Statistics Class 9 Worksheets

 

Maths worksheets play a vital role in strengthening the maths concepts. After studying the concepts of mathematics, revision of questions related to that particular topic is very important for the students. This assesses the preparation of the students. Students can assess themselves by its own by solving the worksheets problems. Parents and teachers can also assess the students by giving them these worksheets to the students to solve.

Maths-formula brings such worksheets on Statistics Class 9 for you. By solving these worksheets, you can increase the understanding of the concepts learnt. These worksheets are prepared by experienced teachers and subject matter experts.

Thus, let us try to attempt these questions to solve and assess yourself. Parents and teachers can also give these questions to the students to test them. Unit tests can also be prepared by the teachers using these questions.

 

Statistics Class 9 Worksheet

 

1. For which value of x is the mode of the following data is 17?

15, 16, 17, 14, 17 16, 13, x, 17, 16, 15, 15

2. Find the median of first sixteen odd numbers.

3. Find the median of first ten prime numbers.

4. A school has two sections. The mean mark of one section of size 40 is 60 and

mean mark of other section of size 60 is 80. Find the combined mean of all

the students of the school.

5. The median of the following observations arranged in ascending order 8, 9,

12, 18, (x + 2), (x + 4), 30, 31, 34, 39 is 24. Find x.

6. The mean weight of 180 students in a school is 50 kg. The mean weight of

boys is 60 kg and the mean weight of the girls is 45 kg. Find the number of the boys and the number of girls in the school.

7. The marks secured by 15 students are 70, 55, 95, 62, 82, 65, 60, 68, 75, 58,

64, 85, 80, 90, 51. Find the median marks.

8. If the mean of 2x + 3, 3x + 4, x + 7, x – 3, 4x – 7 is 14. Find the value of x.

9. The mean of 8 numbers is 15. If each number if multiplied by 2, what will be

the new mean?

10. Find the median of the following data: 33, 31, 48, 45, 41, 92, 78, 51 and 61.

If 92 is replaced by 29, what will be the new median?

11. The mean of 9 numbers is 50. If one number is included, their mean becomes

55. Find the included number.

12. Find the median of the following data: 15, 28, 72, 56, 44, 32, 31, 43 and 51. If 32

is replaced by 23, find the new median.

13. Draw a histogram of the following data.

Class

10-20

20-30

30-40

40-50

50-60

60-70

Frequency

5

10

15

10

5

5

14. Thirty children spent about the number of hours they watched TV programmes in the previous week. The result was as follow:

2             1               10                  4                  8                 10

10           5                2                   8                  9                  8

4             3                5                   6                  1                  4

6             8                2                   5                  8                  8

3             9                3                  10                 4                  6

(a) Prepare a frequency table for the given data.

(b) Find the mode of the data.

15. The daily minimum questions solved by a student during a week were as under:

Monday     

Tuesday      

Wednesday          

Thursday       

Friday       

Saturday

30

35

40

36

28

37

Find the mean questions.

16. The blood groups of 30 students of Class VIII are recorded as follows:

B, A, O, O, AB, O, A, O, B, A, O, B, A, O, O, A, AB, O, A, A, O, O, AB, B, A, O,

B, A, B, O.

Represent this data in the form of a frequency distribution table.

Which is the most common and which is the rarest blood group among these students?

17. Say the statement are true or false.

Two sections of Class XII having 30 students each appeared for Science Olympiad. The marks obtained by them are shown below:

46 31 74 68 42 54 14 61 83 48 37 26 8 64 57

93 72 53 59 38 16 88 75 56 46 66 45 61 54 27

27 44 63 58 43 81 64 67 36 49 50 76 38 47 55

77 62 53 40 71 60 58 45 42 34 46 40 59 42 29

Student having Marks above 80 are exceptional. Student obtaining below 30 marks are failed.

(a) The no of student who scored more than 89 marks is 2

(b) The number who scored, marks between 50-69 is 22

(c) The number of student who scored more than 49 marks is 32

(d) The range of the marks is 85

(e) The no of exceptional students are 4

(f) Student who failed in the test are 7

18. A family with a monthly income of Rs. 20,000 had planned the following expenditure per month under various heads.


Heads

Expenditure (in thousand rupees)

Grocery

5

Medicine

4

Fuel

2

Education

5

Entertainment

2

Rent

1

Miscellaneous

1


19. Draw a bar graph of the following data.


Product

A

B

C

D

E

F

Number of

consumers

150

130

180

160

120

150


 

Maths Worksheets for Other Chapters of Class 9

1. Surface area and volume class 9 worksheets

2. Circles class 9 worksheets

3. Area of parallelograms and triangles worksheets

4. Triangles class 9 worksheets

5. Number system class 9 worksheets

6. Polynomials class 9 worksheets

7. Coordinate geometry class 9 worksheets

8. Linear equations in two variables class 9 worksheets

9. Introduction to Euclid’s geometry class 9 worksheets

10. Lines and angles class 9 worksheets

11. Quadrilaterals class 9 worksheet

12. Heron’s formula class 9 worksheet

14. Probability class 9 worksheet

 


Maths Worksheets for Other Classes


 Maths Worksheets for Class 1

Maths Worksheets for Class 2

Maths Worksheets for Class 3

Maths Worksheets for Class 4

Maths Worksheets for Class 5

Maths Worksheets for Class 6

Maths Worksheets for Class 7

Maths Worksheets for Class 8


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