Essay
An automobile rustproofing company claims that their methods protect cars for 60 months. This hypothesis is tested against the alternative that the protection lasts for less than 60 months. A random sample of 100 cars produces an average time of 57 months with a standard deviation of 15 months.
-Test the hypothesis using the significance level.
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; reject null hypoth...View Answer
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Correct Answer:
Verified
; reject null hypoth...View Answer
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