# probability of a value

A normal distribution has a mean of 50 and a standard deviation of 4.

a) Compute the probability of a value between 44.0 and 55.0

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b) Compute the probability of a value greater than 55.0

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c) Compute the probability of a value between 52.0 and 55.0

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#### Solution Preview

a) P(44<X<55) = P[(44-50)/4<z<(55-50)/4]

=P[-1.5<z<1.25]

=P[z<1.25] - P[z<-1.5]

Look at the ...

#### Solution Summary

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