Introductory Statistics
Introductory Statistics
1st Edition
ISBN: 9781938168208
Author: Barbara Illowsky, Susan Dean
Publisher: OpenStax College
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Chapter 7, Problem 73H

Suppose that the duration of a particular type of criminal thai is known to have a mean of 21 days and a standard deviation of seven days. We randomly sample nine trials.

a. In words. LX _____________

c. Find the probability that the total length of the nine trials Is at least 225 days.

d. Ninety percent of the total of nine of these types of trials will last at least how long?

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Chapter 7 Solutions

Introductory Statistics

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