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A quality inspector believes that the actual mean weight of 200 grams blocks of chocolate is substantially less than what is stated on the label.She

A quality inspector believes that the actual mean weight of 200 grams blocks of chocolate is substantially less than what is stated on the label.She finds that a sample of 25 blocks has an average weight of 195 grams.The standard deviation of all such blocks is known to be 10 grams.Test her belief at the 5% level of significance Calculate and interpret the p-value of the test

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