Please, can you solve the question with formula and explanation?

Suppose you are an expert on the sales of a product and wish to gather information to compare the amount of sales made per month by salesmen from Eskiehir with those from Konya.

The following is the amount of ($000) sales made per month by a sample of 15 Eskiehir Salesmen: 64 31 64 76 25 56 48 48 92 13 23 63 46 22 28 The following is the amount of ($000) sales made per month by a sample of 12 Konya Salesmen. 19 22 27 25 27 31 18 21 20 20 26 25

Is it reasonable to conclude that Eskiehir's sales more?

Use the 0.01 significance level.

Make every possible investigation about the data given to you (if necessary draw graphs).

(Note: There is a six-step procedure that systematizes hypothesis testing, You have to show all the steps as it is given in your book. (be careful with every step and dont end up with ZERO mark))