Homework Answers
Using Excel, go to Data, select Data Analysis, choose t-Test: Paired Two Sample for Means.
| Before | After | |
| Mean | 6 | 5.625 |
| Variance | 3.429 | 2.839 |
| Observations | 8 | 8 |
| Pearson Correlation | 0.412 | |
| Hypothesized Mean Difference | 0 | |
| df | 7 | |
| t Stat | 0.552 | |
| P(T<=t) one-tail | 0.2992 | |
| t Critical one-tail | 1.8946 | |
| P(T<=t) two-tail | 0.5983 | |
| t Critical two-tail | 2.3646 |
H0: µd ≤ 0
Ha: µd > 0
Test statistic (t Stat) = 0.552
p-value (one-tail) = 0.2992
Since p-value is more than 0.05,
Do not reject H0. There is insuffiecient evidence to conclude that seeing the commercial improves the mean potential to purchase.
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