State DMV records indicate that of all vehicles undergoing emissions testing during the previous year, 70% passed
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State DMV records indicate that of all vehicles undergoing emissions testing during the previous year, 70% passed on the first try. A random sample of 200 cars tested in a particular county during the current year yields 124 that passed on the initial test. Does this suggest that the true proportion for this county during the current year differs from the previous statewide proportion? Test the relevant hypotheses using α = .05.
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To test whether the true proportion of cars passing on the initial test in the current year for this county differs from the previous statewide propor...View the full answer
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Related Book For
Modern Mathematical Statistics With Applications
ISBN: 9783030551551
3rd Edition
Authors: Jay L. Devore, Kenneth N. Berk, Matthew A. Carlton
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