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Part 1 of 3 10 A publisher wants to estimate the mean length of time...

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Part 1 of 3 10 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 o is 1 9 minutes and that the population of times is normally distributed 12 8 7 7 8 6 6 11 Points 0 of 1 10 12 9 Construct the 90 and 99 confidence intervals for the population mean Which interval is wider If convenient use technology to construct the confidence intervals The 90 confidence interval is Round to one decimal place as needed 11 Save 8 8

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