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Problem

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12 Nov 2021

Given information

The sample size is 100. The sample mean and sample standard deviation is 23.6 and 7 hours respectively. The population is normally distributed.

From the previous task, the 90% confidence interval for the population mean is found to be  

Step-by-step explanation

Step 1.

Since the sample mean is 23.6 and the 90% confidence interval is  , the sketch of the graph of the confidence interval can be drawn as shown below:

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Introductory Statistics
OER Edition, 2013
Openstax
ISBN: 9781938168208

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