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A livestock company reports that the mean weight of a group of young steers is 1100 pounds with a standard deviation of 66 pounds. Based

A livestock company reports that the mean weight of a group of young steers is 1100 pounds with a standard deviation of 66 pounds. Based on the model N(1100,66) for the weights ofsteers, what percent of steers weigh

a) over 900 pounds?

b) under 1150 pounds?

c) between 1200 and 1300 pounds?

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