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27. A random variable X has a bell-shaped symmetric distribu- tion, with expected value = 200 and standard deviation σ 20. The empirical rule tells us that X has a value greater than approximately 0.15% of the time. 28. A random variable X has a bell-shaped symmetric distribu- tion, with expected value = 100 and standard deviation σ = 30. Use the empirical rule to give an interval in which X lies approximately 95% of the time.

27. A random variable X has a bell-shaped symmetric distribu- tion, with expected value = 200 and standard deviation σ 20. The empirical rule tells us that X has a value greater than approximately 0.15% of the time. 28. A random variable X has a bell-shaped symmetric distribu- tion, with expected value = 100 and standard deviation σ = 30. Use the empirical rule to give an interval in which X lies approximately 95% of the time.

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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27. A random variable X has a bell-shaped symmetric distribu- tion, with expected value = 200 and standard deviation σ = 20. The empirical rule tells us that X has a value greater than approximately 0.15% of the time. 28. A random variable X has a bell-shaped symmetric distribu- tion, with expected value = 100 and standard deviation ர σ = 30. Use the empirical rule to give an interval in which X lies approximately 95% of the time.
Transcribed Image Text:27. A random variable X has a bell-shaped symmetric distribu- tion, with expected value = 200 and standard deviation σ = 20. The empirical rule tells us that X has a value greater than approximately 0.15% of the time. 28. A random variable X has a bell-shaped symmetric distribu- tion, with expected value = 100 and standard deviation ர σ = 30. Use the empirical rule to give an interval in which X lies approximately 95% of the time.
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