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 2.4 minutes and that the population of times is normally distributed. 10 12 6 6 12 6 11 8 11 7 12 7 8 11 11 Question content area bottom Part 1 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 ​(enter your response here ​,enter your response here ​). ​ (Round to one decimal place as​ needed.)

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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
2.4
minutes and that the population of times is normally distributed.
 
10
12
6
6
12
6
11
8
11
7
12
7
8
11
11
 
 
 
 

Question content area bottom

Part 1
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
​(enter your response here
 
​,enter your response here
 
​).
​ (Round to one decimal place as​ needed.)
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