Question
In a recent study of 67 eighth graders, the mean number of hours per week that they watched television was 17.5. Assume the population standard
In a recent study of 67 eighth graders, the mean number of hours per week that they watched television was 17.5. Assume the population standard deviation is 5.4 hours.
a) Find the 98% confidence interval of the mean.
b) If the standard deviation is doubled to 10.8, what will be the effect on the confidence interval?
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Probability Theory A Concise Course
Authors: Y A Rozanov
1st Edition
0486321142, 9780486321141
