question archive A publisher wants to estimate the mean length of time? (in minutes) all adults spend reading newspapers
A publisher wants to estimate the mean length of time? (in minutes) all adults spend reading newspapers
Subject:StatisticsPrice: Bought3
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 σ is 1.8 minutes and that the population of times is normally distributed.
7
7
12
12
7
10
8
8
9
11
7
9
8
6
8
Construct the? 90% and? 99% confidence intervals for the population mean. Which interval is? wider? If? convenient, use technology to construct the confidence intervals.
