Suppose as part of your job you are responsible for installing emergency lighting in a series of

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Suppose as part of your job you are responsible for installing emergency lighting in a series of state office buildings. Bids have been received from four manufacturers of battery-operated emergency lights. The costs are about equal, so the decision will be based on the length of time the lights last before failing.
A sample of four lights from each manufacturer has been tested, with the following values (time in hours) recorded for each manufacturer:

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Using α = 0.01, what conclusion for the four manufacturers should you reach about the median length of time the lights last before failing? Explain.
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Business Statistics A Decision Making Approach

ISBN: 9780133021844

9th Edition

Authors: David F. Groebner, Patrick W. Shannon, Phillip C. Fry

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