The quality control manager at a light bulb factory needs to estimate the mean life of light bulbs. The manufacturers sp

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answerhappygod
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The quality control manager at a light bulb factory needs to estimate the mean life of light bulbs. The manufacturers sp

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The quality control manager at a light bulb factory needs to
estimate the mean life of light bulbs. The manufacturers
specifications are that the population standard deviation is 100
hours. A random sample of 64 light bulbs indicated a sample mean of
350 hours.
A. Find the point estimate of the population mean life of light
bulbs.
B. Find the 95% confidence interval for the population mean life
of light bulbs.
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