Given are five observations collected in a regression study on two variables.
|
x1
|
2
|
6
|
9
|
13
|
20
|
|
y1
|
7
|
18
|
9
|
26
|
23
|
1. What percentage of the total sum of squares can be accounted for by the estimated regression equation? Answer_____%
2. What is the value of the sample correlation coefficient (to three decimals)? Answer __________.
3. What is the value of the standard error of the estimate (to four decimals) ? Answer _________.
4. Test for a significant relationship using the t test. Use ? = .05. t = Answer (to two decimals) _________.
5. Use the F test to test for a significant relationship. Use ? = .05 F = Answer (to two decimals) _________.
6. Develop the 95% confidence interval when x = 12 (to two decimals) __________ to ___________.
7. Develop the prediction interval when x = 12 (to two decimals) __________ to ____________.