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
|