The quality-control manager at a light bulb factory needs to determine whether the mean life of a
Question:
a. At the 0.05 level of significance, is there evidence that the mean life is different from 375 hours?
b. Compute the p-value and interpret its meaning.
c. Construct a 95% confidence interval estimate of the population mean life of the light bulbs.
d. Compare the results of (a) and (c). What conclusions do you reach?
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a PHStatoutput Data Null Hypothesis m 375 Level of Significance 005 Population Standard Deviation 10...View the full answer
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Related Book For 
Statistics For Managers Using Microsoft Excel
ISBN: 772
7th Edition
Authors: David M. Levine, David F. Stephan, Kathryn A. Szabat
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