Aslin Finch would like to determine the effect of shelf space on the sales of pet food. A random sample of 15 stores is selected with the following results. Set alpha at .01.
| Store ID |
Shelf Space Allocated to Pet Food (X) |
Weekly Pet Food Sales in Hundreds of dollars (y) |
| 1 |
5 |
1.6 |
| 2 |
5 |
2.2 |
| 3 |
5 |
1.4 |
| 4 |
10 |
1.9 |
| 5 |
10 |
2.4 |
| 6 |
10 |
2.6 |
| 7 |
15 |
2.3 |
| 8 |
15 |
2.7 |
| 9 |
15 |
2.8 |
| 10 |
20 |
2.6 |
| 11 |
20 |
2.9 |
| 12 |
20 |
3.1 |
| 13 |
25 |
3.3 |
| 14 |
25 |
3.5 |
| 15 |
25 |
3.4 |
Use Statistics and minitab to:
Determine a problem definition
scatterplot
correlation coefficiant
regression equation
significance testing (regression coefficient)
significance testing (anova)
satisfying regression assumptions
confidence interval for regression coefficient
prediction and confidence interval for Fit value of Y