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A normal population has a mean of 98.0 and a standard deviation of 9.0. ( Round z-score computation to 2 decimal places and the final

A normal population has a mean of 98.0 and a standard deviation of 9.0. (Round z-score computation to 2 decimal places and the final answer to 4 decimal places.)

a) Compute the probability of a value between 89.0 and 121.0

b) Compute the probability of a value 89.0 or less

c) Compute the probability of a value between 75.0 and 85.0.

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