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Given are five observations collected in a regression study on two variables.
x1
2
6
9
13
20
y1
7
18
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 ____________.
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