A consumer advocacy group suspects that a local supermarket's 750 grams of sugar actually weigh less than 750 grams. The group took a random sample of 20 such packages, weighed each one and found the mean weight for the sample to be 746 grams with a standard deviation of 8 grams. Using 10% significance level, would you conclude that the mean weight is less than 750 grams?

MATLAB: An Introduction with Applications
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ISBN:9781119256830
Author:Amos Gilat
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A consumer advocacy group suspects that a local
supermarket's 750 grams of sugar actually weigh less than
750 grams. The group took a random sample of 20 such
packages, weighed each one and found the mean weight for
the sample to be 746 grams with a standard deviation of 8
grams. Using 10% significance level, would you conclude that
the mean weight is less than 750 grams?
Transcribed Image Text:A consumer advocacy group suspects that a local supermarket's 750 grams of sugar actually weigh less than 750 grams. The group took a random sample of 20 such packages, weighed each one and found the mean weight for the sample to be 746 grams with a standard deviation of 8 grams. Using 10% significance level, would you conclude that the mean weight is less than 750 grams?
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