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A U.S. dime is supposed to weight 2.268 grams. A random sample of 15 circulated dimes...

A U.S. dime is supposed to weight 2.268 grams. A random sample of 15 circulated dimes showed a mean weight of 2.256 grams with a standard deviation of .026 grams.

a. Using α=.05 is the mean weight of all circulated dimes lower than the specification State your hypothesis and your decision rule.

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