NCERT Solutions 10th Maths Chapter 14 Statistics Exercise 14.1

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Exercise 14.1
1.A survey was conducted by a group of students as a part of their environmental 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 the mean of the data by the direct method.

Hence, we have used the direct method to find the mean of the given data, because the numerical values of f1 and x1 are small.
2.Consider the following distribution of daily wages of 50 workers of a factory.

Find the mean daily wages of the workers of the factory by using an appropriate method.
Solution:
In this case, we can use step-deviation method because the sata is large.
Here, a = 150 and h = 20