NCERT Mathematics Class 9 Exemplar Ch 14 Statistics and Probability Part 9

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Q.5. Convert the given frequency distribution into a continuous grouped frequency distribution:

Convert the Given Frequency Distribution into a Continuous Grouped Frequency Distribution
Convert the given frequency distribution into a continuous grouped frequency distribution

Class interval

Frequency

In which intervals would and be included?

Answer:

153.5 is Included in the Class Interval 153.5-157.5 and 157.5 in 157.5 - 161.5
153.5 is included in the class interval 153.5-157.5 and 157.5 in 157.5 - 161.5

Class intervals

Frequency

153.5 is included in the class interval and in .

Q.6. The expenditure of a family on different heads in a month is given below:

The Expenditure of a Family on Different Heads in a Month
The expenditure of a family on different heads in a month

Head

Food

Education

Clothing

House Rent

Others

Savings

Expenditure (in Rs)

Draw a bar graph to represent the data above.

Q.7. Expenditure on Education of a country during a five year period in crores of rupees is given below:

Expenditure on Education of a Country During a Five Year Period (2002-2006),
Expenditure on Education of a country during a five year period (2002-2006),

Elementary education

Secondary Education

University Education

Teacher’s Training

Social Education

Other Educational Programmes

Cultural programmes

Technical Education

Represent the information above by a bar graph.

Q.8. The following table gives the frequencies of most commonly used letters a , e, i, o , r , t, u from a page of a book :

Table Gives the Frequencies of Most Commonly Used Letters a , E, I, O , R , T, U from a Page of a Book
table gives the frequencies of most commonly used letters a , e, i, o , r , t, u from a page of a book

Letters

a

e

i

o

r

t

u

Frequency

75

125

80

70

80

95

75

Represent the information above by a bar graph.

Q.9. If the mean of the following data is 20.2, find the value of p:

The Mean of the Following Data is 20.2, Find the Value of P
The mean of the following data is 20.2, find the value of p

X

10

15

20

25

30

f

6

8

p

10

6

Answer: 20

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