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The life in hours of a 75-watt light bulb is known to be normally distributed with o = 25 hours. A random sample of 14 bulbs has a mean life of I = 1014 hours. (a) Construct a 95% two-sided confidence interval on the mean life. Round your answers to the nearest integer (e.g. 9876). i i eTextbook and Media (b) Construct a 95% lower-confidence bound on the mean life. Compare the lower bound of this confidence interval with the one in part (a). Round your answer to the nearest integer (e.g. 9876). i

The life in hours of a 75-watt light bulb is known to be normally distributed with o = 25 hours. A random sample of 14 bulbs has a mean life of I = 1014 hours. (a) Construct a 95% two-sided confidence interval on the mean life. Round your answers to the nearest integer (e.g. 9876). i i eTextbook and Media (b) Construct a 95% lower-confidence bound on the mean life. Compare the lower bound of this confidence interval with the one in part (a). Round your answer to the nearest integer (e.g. 9876). i

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 life in hours of a 75-watt light bulb is known to be normally distributed with o = mean life of I = 1014 hours. 25 hours. A random sample of 14 bulbs has a (a) Construct a 95% two-sided confidence interval on the mean life. Round your answers to the nearest integer (e.g. 9876). i <μ < i eTextbook and Media (b) Construct a 95% lower-confidence bound on the mean life. Compare the lower bound of this confidence interval with the one in part (a). Round your answer to the nearest integer (e.g. 9876). i
Transcribed Image Text:The life in hours of a 75-watt light bulb is known to be normally distributed with o = mean life of I = 1014 hours. 25 hours. A random sample of 14 bulbs has a (a) Construct a 95% two-sided confidence interval on the mean life. Round your answers to the nearest integer (e.g. 9876). i <μ < i eTextbook and Media (b) Construct a 95% lower-confidence bound on the mean life. Compare the lower bound of this confidence interval with the one in part (a). Round your answer to the nearest integer (e.g. 9876). i
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