A publisher wants to estimate the mean length of time (in minutes) people and obtains the results below. From past studies, the publisher assumes o is 2,1 minutes and that the population of times is normally distributed. adults spend reading newspapers. To determine this estimate, the publisher takes a random sample of 15 8 7 10 12 8 10 12 12 9. 7 10 10 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.)
A publisher wants to estimate the mean length of time (in minutes) people and obtains the results below. From past studies, the publisher assumes o is 2,1 minutes and that the population of times is normally distributed. adults spend reading newspapers. To determine this estimate, the publisher takes a random sample of 15 8 7 10 12 8 10 12 12 9. 7 10 10 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.)
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
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Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Transcribed Image Text: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 2,1 minutes and that the population of times is normally distributed.
8
7
10
12
8
10
12
12
9.
9.
10
10
7.
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 ( I D. (Round to one decimal place as needed.)
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