The random variable Z has a standard normal distrubutionSolu

The random variable Z has a standard normal distrubution.

Solution

(a) P(Z<=2.17) =0.9850 (from standard normal table)

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(b)P(Z>=-1.43) =0.9236 (from standard normal table)

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(c) P(-0.51<=Z<=1.36) = 0.6081 (from standard normal table)