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:

Type A Type B Type C Type D 1,024 1,270 1,121 923 1,121 1,325 1,201 983 1,250 1,426 1,190 1,087 1,022 1,322 1,122 1,121 Using a  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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Related Book For  book-img-for-question

Business Statistics A Decision Making Approach

ISBN: 9780136121015

8th Edition

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

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