Construct a 95% lower confidence interval on the mean life, Basic Statistics

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Construct a 95% lower confidence interval on the mean life

The life in hours of a 100-watt light bulb is known to be approximately normally distributed with standard deviation ? = 25 hours. A random sample of 20 bulbs has a mean life of 1014 hours.
a. Construct a 95% two-sided confidence interval on the mean life
b. Construct a 95% lower confidence interval on the mean life
c. Suppose we wanted the total width of the two-sided confidence interval on the mean life of the bulbs to be 6 hours at 95% confidence, what sample size should be used?

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Basic Statistics: Construct a 95% lower confidence interval on the mean life

Reference No:- TGS0119706

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Basic Statistics: Construct a 95% lower confidence interval on the mean life

Reference No:- TGS0119706

Have a Question? (oR Write a Review)

Recent Questions Asked Basic Statistics

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Request for Solution File

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Basic Statistics: Construct a 95% lower confidence interval on the mean life

Reference No:- TGS0119706

Recent Questions Asked Basic Statistics

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