The life in hours of a 75-watt light bulb is known to be normally distributed with o = 25 hours. A random sample of 24 bulbs has a mean life ofx = 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 e Textbook and Media

MATLAB: An Introduction with Applications
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ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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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 24 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
e Textbook and Media
FCB
Transcribed Image Text:The life in hours of a 75-watt light bulb is known to be normally distributed with o = 25 hours. A random sample of 24 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 e Textbook and Media FCB
(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
eTextbook and Media
R
K
V.
B
N
Transcribed Image Text:(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 eTextbook and Media R K V. B N
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