The standard deviation for a population is ? = 15.3. A sample of 36 observations selected from this population gave a mean equal to 74.8. a. Make a 90% confidence interval for ? . b. Construct a 95% confidence interval for ? . c. Determine a 99% confidence interval for ?. d. Does the width of the confidence intervals constructed in parts a through c increase as the confidence level increases? Explain your answer.
The standard deviation for a population is ? = 15.3. A sample of 36 observations selected from this population gave a mean equal to 74.8. a. Make a 90% confidence interval for ? . b. Construct a 95% confidence interval for ? . c. Determine a 99% confidence interval for ?. d. Does the width of the confidence intervals constructed in parts a through c increase as the confidence level increases? Explain your answer.
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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The standard deviation for a population is ? = 15.3. A sample of 36 observations selected from this
population gave a mean equal to 74.8.
a. Make a 90% confidence interval for ? .
b. Construct a 95% confidence interval for ? .
c. Determine a 99% confidence interval for ?.
d. Does the width of the confidence intervals constructed in parts a through c increase as the
confidence level increases? Explain your answer.
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