CBSE Class 10-Mathematics: Chapter –14 Statistics Part 12

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Question 4:

Draw a less than O give for the following frequency distribution.

Draw a less than O give for the following frequency distribution

Marks

No. of students

Answer:

We have

Draw a less than O give for the following frequency distribution

Marks

Frequency (F)

C.F

4

6

10

8

4

Draw a less than O give for the following frequency distribution

Upper class limits

Cumulative frequency

Plot the points

Join these points by a free hand curve. We get the required give which is as follows:

Join these points by a free hand curve

Join These Points by a Free Hand Curve

Loading image

Question 5:

Find the mean age in years from the frequency distribution given below:

The frequency distribution

Age

Total

Frequency

Answer:

We have

Find the mean age in years from the frequency distribution given below

Class-Interval

Mid value

Total

Let assumed mean ‘a’ , Here

We know that Mean