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The US Mint selects ten pennies from the production line to test the hypothesis that the mean weight of each penny is 4 grams. The normally-distributed weights (in grams) of these pennies are as follows: 7, 3, 8, 5, 9, 9, 5, 5, 3, 5. Assume squiggley a = 0.05.

• State the null and alternate hypotheses

• find out the sample mean and standard deviation

• Determine which test statistic is appropriate (z or t), and find out its value.

• Determine the critical value(s).

• State your decision: Should the null hypothesis be rejected?

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Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M9115851

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