NCERT Solutions for Class 10 Maths Chapter 14 Statistics

Chapter 14 Statistics

NCERT Solutions for Class 10 Maths Chapter 14 Statistics Excercise 14.1

Question 1.

A survey was conducted by a group of students as a part of their environment awareness programme, in which they collected the following data regarding the number of plants in 20 houses in a locality. Find the mean number of plants per house.

Which method did you use for finding the mean, and why?

Solution:

Let us find class marks (xi) for each interval by using the relation.

From the table we may observe that

Now we may compute xi and fixi as following

NCERT Solutions for Class...ths Chapter 14 Statistics

So, mean number of plants per house is 8.1.

We have used here direct method as values of class marks (xi) and fi are small.