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Assume thatwomen'sheights are normally distributed with a mean given by=63.1in,and a standard deviation given by=3.1in. (a)If 1 woman is randomlyselected,find the probability that her height

Assume thatwomen'sheights are normally distributed with a mean given by=63.1in,and a standard deviation given by=3.1in.

(a)If 1 woman is randomlyselected,find the probability that her height is less than64in.

(b)If 31women are randomlyselected,find the probability that they have a mean height less than64in.

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