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143.30. The population is known to have a normal distribution. this population gave a mean equal to Round your answers to two decimal places. a. Make a 99% confidence interval for u. i b. Construct a 95% confidence interval for u. i c. Determine a 90% confidence interval for u.

143.30. The population is known to have a normal distribution. this population gave a mean equal to Round your answers to two decimal places. a. Make a 99% confidence interval for u. i b. Construct a 95% confidence interval for u. i c. Determine a 90% confidence interval for u.

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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The standard deviation for a population is 0 = 14.3. A sample of 21 observations selected from this population gave a mean equal to 143.30. The population is known to have a normal distribution. Round your answers to two decimal places. a. Make a 99% confidence interval for u. i b. Construct a 95% confidence interval for u. c. Determine a 90% confidence interval for u. d. Does the width of the confidence intervals constructed in parts a through c decrease as the confidence level decreases?
Transcribed Image Text:The standard deviation for a population is 0 = 14.3. A sample of 21 observations selected from this population gave a mean equal to 143.30. The population is known to have a normal distribution. Round your answers to two decimal places. a. Make a 99% confidence interval for u. i b. Construct a 95% confidence interval for u. c. Determine a 90% confidence interval for u. d. Does the width of the confidence intervals constructed in parts a through c decrease as the confidence level decreases?
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