Past experience indicates that the time for high school seniors to complete a standardized test is a
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Past experience indicates that the time for high school seniors to complete a standardized test is a normal random variable with a mean of 35 minutes. If a random sample of 20 high school seniors took an average of 33.1 minutes to complete this test with a standard deviation of 4.3 minutes, test the hypothesis at the 0.05 level of significance that p = 35 minutes against the alternative that p < 35 minutes.
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The hypotheses are a 005 and df 19 Critical ...View the full answer
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Related Book For 
Probability & Statistics For Engineers & Scientists
ISBN: 9780130415295
7th Edition
Authors: Ronald E. Walpole, Raymond H. Myers, Sharon L. Myers, Keying
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