A wine manufacturer is concerned that the percentage of alcohol in each bottle may not be the 13% as advertised on the bottle. A random sample of 31 bottles is tested. The average alcohol percentage is 12.58% and the standard deviation is 0.25%. Assume alcohol content is normally distributed.
-How would you define the rejection region for this test at ? = .001?
A) t > 2.575
B) t > 2.33
C) t > 1.96 and t < -1.96
D) t > 3.646 and t < -3.646
E) t > 2.728 and t < -2.728
Correct Answer:
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