Question 1: The following data are results from a study you recently completed. Calculate the correlation coefficient for this data. (Show work or use excel print out)
|
X
|
Y
|
(X-X‾)
|
(Y-Y‾)
|
(X-X‾)2
|
(Y-Y‾)2
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(X-X‾)(Y-Y‾)
|
|
4
|
4
|
-1.6
|
-1.8
|
2.56
|
3.24
|
2.88
|
|
5
|
6
|
-0.6
|
0.2
|
0.36
|
0.04
|
-0.12
|
|
3
|
5
|
-2.6
|
-0.8
|
6.76
|
0.64
|
2.08
|
|
6
|
7
|
0.4
|
1.2
|
0.16
|
1.44
|
0.48
|
|
10
|
7
|
4.4
|
1.2
|
19.36
|
1.44
|
5.28
|
|
|
|
|
|
|
|
|
|
|
|
|
|
29.2
|
6.8
|
|
Question 2: Given the following information what is the regression equation? The value of r is (minus) -0.8908 with a standard deviation for X= 1.73 & Y= 3.34. The Mean of X = 4.875 and the Mean of Y = 10.625.