SOLUTION: A publisher wants to estimate the mean length of time (in minutes) all adults spend reading newspapers. To determine this estimate, the publisher takes a random sample of 15
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Question 1154416: A publisher wants to estimate the mean length of time (in minutes) all adults spend reading newspapers. To determine this estimate, the publisher takes a random sample of 15 people and obtains the results below. From past studies, the publisher assumes sigma is 2.2 minutes and that the population of times is normally distributed.
6
11
6
6
11
6
11
7
7
12
8
9
8
10
8
Construct the 90% and 99% confidence intervals for the population mean. Which interval is wider?
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