Refer to Exercise 2.29. You can use the Empirical Rule to see why the distribution of survival

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Refer to Exercise 2.29. You can use the Empirical Rule to see why the distribution of survival times could not be mound-shaped.
Exercise 2.29
A group of laboratory animals is infected with a particular form of bacteria, and their survival time is found to average 32 days, with a standard deviation of 36 days.
a. Find the value of x that is exactly one standard deviation below the mean.
b. If the distribution is in fact mound-shaped, approximately what percentage of the measurements should be less than the value of x found in part a?
c. Since the variable being measured is time, is it possible to find any measurements that are more than one standard deviation below the mean? Use your answers to parts b and c to explain why the data distribution cannot be mound-shaped.
Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...
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Introduction To Probability And Statistics

ISBN: 9781133103752

14th Edition

Authors: William Mendenhall, Robert Beaver, Barbara Beaver

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