1. The sales figures of two firms (in million Rs.) calculated over a period of time are as follows:

Firm A   120    100     110     80      90     70     50      60      40 

Firm B    50      40       60      90       80     70    110    100    120

a. Find mean and standard deviation of both the firms and interpret the same.

b. Which firm has better performance? How do you analyze the performance in this case?

c. If you need to invest in a firm then which firm would you choose and why? (10 Marks)

The answer should be in a word format, Not writing in-plane paper. It should be a plagiarism-free. And a min of 800 words