Sanchez Electronics sells electronic components for car stereos. It claims that the average life of a component
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Sanchez Electronics sells electronic components for car stereos. It claims that the average life of a component exceeds 4,000 hours. To test this claim, it has selected a random sample of n = 12 of the components and traced the life between installation and failure. The following data were obtained:
1,973 4,838 3,805 4,494 4,738 5,249 4,459 4,098 4,722 5,894 3,322 4,800
a. State the appropriate null and alternative hypotheses.
b. Assuming that the test is to be conducted using a 0.05 level of significance, what conclusion should be reached based on these sample data? Be sure to examine the required normality assumption.
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Related Book For
Business Statistics
ISBN: 9781292220383
10th Global Edition
Authors: David Groebner, Patrick Shannon, Phillip Fry
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