A U.S. dime weighs 2.270 grams when minted. A random sample of 25 circulated dimes showed a mean weight of 2.259 grams with a standard deviation of .025 gram. (a) Using α=.05, is the mean weight of all circulated dimes lower than the mint weight? State your hypotheses and conclusion.

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Q: Are low-fat diets or low-carb diets more effective for weight loss? A sample of 78 subjects went on…

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