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A livestock company reports that the mean weight of a group of young steers is 1161 pounds with a standard deviation of 77 pounds. Based

A livestock company reports that the mean weight of a group of young steers is 1161 pounds with a standard deviation of 77 pounds. Based on the model N(1161,77) for the weights ofsteers, what percent of steers weigh

a) over 900 pounds?

b) under 1050 pounds?

c) between 1100 and 1250 pounds?

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