MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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The following random sample was selected from a normal distribution: 4, 6, 3, 5, 9, 3.
a.
Construct a 90% confidence interval for the population mean.
b. Construct a 95% confidence interval for the population mean.
c. Construct a 99% confidence interval for the population mean.
d. Assume that the sample mean x and sample standard deviation s remain exactly the same as
those you just calculated but are based on a sample ofn= 25 observations rather than n = 6
observations. Repeat parts a-c. What is the effect of increasing the sample size on the width
n3D
%3D
of the confidence intervals?
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Transcribed Image Text:The following random sample was selected from a normal distribution: 4, 6, 3, 5, 9, 3. a. Construct a 90% confidence interval for the population mean. b. Construct a 95% confidence interval for the population mean. c. Construct a 99% confidence interval for the population mean. d. Assume that the sample mean x and sample standard deviation s remain exactly the same as those you just calculated but are based on a sample ofn= 25 observations rather than n = 6 observations. Repeat parts a-c. What is the effect of increasing the sample size on the width n3D %3D of the confidence intervals?
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