Скачать или смотреть The manufacturer of a new food additive for beef cattle claims that 80 % of the animals fed a diet…

The manufacturer of a new food additive for beef cattle claims that 80 % of the animals fed a diet including this additive should have monthly weight gains in excess of 20 pounds. A large sample of measurements on weight gains for cattle fed this diet exhibits an approximately normal distribution with mean 22 pounds and standard deviation 2 pounds. Do you think the sample information contradicts the manufacturer #x27;s claim? (Calculate the probability of a weight gain exceeding 20 pounds.)

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