In a recent study of 92 eighth graders, the mean number of hours per week that they watched television was
22.6. Assume the population standard deviation is 5.2 hours.
a)Find the 99% confidence interval of the mean.
b)If the standard deviation is doubled to 10.4, what will be the effect on the confidence interval?

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The Answer of In a recent study of 92 eighth graders, the mean number of hours per week that they watched television was
22.6. Assume the population standard deviation is 5.2 hours.
a)Find the 99% confidence interval of the mean.
b)If the standard deviation is doubled to 10.4, what will be the effect on the confidence interval?

In a Recent Study of 92 Eighth Graders, the Mean