For the X,Y data below, compute:
(a) r and determine if it is significantly different from zero.
(b) the slope of the regression line and test if it differs significantly from zero.
(c) the 95% confidence interval for the slope.
|
X
|
Y
|
|
2
|
5
|
|
4
|
6
|
|
4
|
7
|
|
5
|
11
|
|
6
|
12
|