A manufacturer wishes to estimate the reliability (in months) of a certain product. An estimate of the population standard deviation from a previous sample was 12 months. If the manufacturer desires to be within 4 months of the true value with approximately 80% confidence, what should the sample size be?

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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A manufacturer wishes to estimate the reliability (in months) of a certain product. An estimate of
the population standard deviation from a previous sample was 12 months. If the manufacturer
desires to be within 4 months of the true value with approximately 80% confidence, what should
the sample size be?
Remember, enter your answer as a VWHOLE NUMBER.
Transcribed Image Text:A manufacturer wishes to estimate the reliability (in months) of a certain product. An estimate of the population standard deviation from a previous sample was 12 months. If the manufacturer desires to be within 4 months of the true value with approximately 80% confidence, what should the sample size be? Remember, enter your answer as a VWHOLE NUMBER.
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