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Problem

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Textbook Expert
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12 Nov 2021

Given information

84 conferences are chosen as a sample and their lengths in days are measured. The mean length of the conferences is found to be 3.94 days and standard deviation is 1.28 days. The underlying population is given to be normally distributed. From the previous task, the normal distribution is chosen to model the problem.

Step-by-step explanation

Step 1.

The standard deviation of the population is estimated to be equal to the standard deviation of the sample. Therefore, it follows:

 

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Introductory Statistics
OER Edition, 2013
Openstax
ISBN: 9781938168208

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