Question: 1.Given the following data ( for 25 points ). Show all computations; you may use excel to verify your answer and the second part of

1.Given the following data (for 25 points).

Show all computations; you may use excel to verify your answer and the second part of e.

X= additional number of studying hours since last exam

3

3

7

5

8

9

14

Y= Grade improvement since last exam

5

5

7

8

10

15

20

a.Draw a scatter diagram and speculate on the linear relationship between x and y

b.Find the coefficient of correlation and Comment on it

c.Compute the coefficient of determination and tell us what that means

d.Find the equation of the regression line

e.Use the regression model to compute the valueof x if y = 9.2; is this a case of "garbage in garbage out"? Why?

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