Construct the 90% and 99% confidence intervals for the population mean. Which interval is wider?
Construct the 90% and 99% confidence intervals for the population mean. Which interval is wider?
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.5: Comparing Sets Of Data
Problem 14PPS
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Question
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 1.9 minutes and that the population of times is normally distributed.
7
|
7
|
6
|
12
|
9
|
10
|
12
|
9
|
11
|
8
|
8
|
8
|
6
|
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.
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