The Penn Oil Company wished to verify the viscosity of its premium 30-weight oil. A simple random

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The Penn Oil Company wished to verify the viscosity of its premium 30-weight oil. A simple random sample of specimens taken from automobiles running at normal temperatures was obtained. The viscosities observed were as follows:

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Determine if the median viscosity at normal running temperatures is equal to 30 as advertised for Penn’s premium 30-weight oil. (Use α = 0.05.)
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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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