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Question
Consumer Reports would like to conduct a hypothesis test to determine if the average battery life for an iPad is different from the average battery life for a Kindle Fire. The following data represents the battery life from a random sample of iPads and Kindle Fires in hours. Assume that the population variances are equal.
| iPad | 9 | 5 | 8 | 7 | 8 | 9 | 11 | 11 |
| Kindle | 10 | 9 | 10 | 9 | 12 | 10 | 10 |
Define Population 1 as iPads and Population 2 as Kindles and use the critical value approach to test this hypothesis with 
= 0.02.
Answer
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