The output voltage of a power supply is assumed to be normally distributed. Sixteen observations taken at
Question:
The output voltage of a power supply is assumed to be normally distributed. Sixteen observations taken at random on voltage are as follows: 10.35, 9.30, 10.00, 9.96, 11.65, 12.00, 11.25, 9.58, 11.54, 9.95, 10.28, 8.37, 10.44, 9.25, 9.38, and 10.85.
a. Test the hypothesis that the mean voltage equals 12 V using a 95% two-sided confidence interval.
b. Test the hypothesis that the variance equals 1 V using a 95% two-sided confidence interval.
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a Since 12 is not in the 95 CI we conclude that the mean vo...View the full answer
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Related Book For 
Managing Controlling and Improving Quality
ISBN: 978-0471697916
1st edition
Authors: Douglas C. Montgomery, Cheryl L. Jennings, Michele E. Pfund
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