The selling price in $ for the deluxe and standard model Ryobi ...

The selling price in $ for the deluxe and standard model Ryobi wood sanders are shown for a sample of eight retail stores. Does the data suggest the difference in average selling price of the Ryobi models is more than $10 at a=0.01?

Retail   Store

Deluxe

Standard

1

41

30

2

41

31

3

45

34

4

31

20

5

35

23

6

40

30

7

33

20

8

33

23

Question 1: What is the test statistic? Question 2: What is the conclusion?  Question 3: What is the P value?