A researcher polled a sample of 1087 adults in the year 2010 , asking them how many hours per week they spent on the Internet. The sample mean was 10.49 with a standard deviation of 14.21 . A second...

A researcher polled a sample of

 adults in the year

, asking them how many hours per week they spent on the Internet. The sample mean was

 with a standard deviation of

. A second sample of

 adults was taken in the year

. For this sample, the mean was

 with a standard deviation of

. Assume these are simple random samples from populations of adults. Can you conclude that the mean number of hours per week spent on the Internet differs between

 and

? Let

 denote the mean number of hours spent on the Internet in

. Use the

 level and the

-value method with the TI-84 calculator.