The service life of a battery used in a cardiac pacemaker is assumed to be normally distributed.
Question:
(a) The manufacturer wants to be certain that the mean battery life exceeds 25 h. What conclusions can be drawn from these data (use a= 0.05).
(b) Construct a 90% two-sided confidence interval on mean life in the accelerated test.
(c) Construct a normal probability plot of the battery life data. What conclusions can you draw?
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Related Book For
Introduction to Statistical Quality Control
ISBN: 978-1118146811
7th edition
Authors: Douglas C Montgomery
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