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it is reported that the average length of a banana is 21 inches with 2.1 standard deviation a sample of 30 bananas had an average
it is reported that the average length of a banana is 21 inches with 2.1 standard deviation a sample of 30 bananas had an average length of 21.9 inches. does it seem like the population has an average length greater than 21 inches? a= 0.01
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