Question
The quality control manager at a light bulb factory needs to estimate the mean life of a large shipment of light bulbs. The standard deviation
The quality control manager at a light bulb factory needs to estimate the mean life of a large shipment of light bulbs. The standard deviation is 98 hours. A random sample of 49 light bulbs indicated a sample mean life of 360 hours. Complete parts(a) through(d) below.
a. Construct a 99% confidence interval estimate for the population mean life of light bulbs in this shipment.
The 99% confidence interval estimate is from a lower limit of hours to an upper limit of
hours.
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Probability With Applications and R
Authors: Robert P. Dobrow
1st edition
1118241257, 1118241258, 978-1118241257
