Question: A variable is normally distributed with mean 12 and standard deviation4. a. Find the percentage of all possible values of the variable that lie between

A variable is normally distributed with mean

12 and standard deviation4.

a. Find the percentage of all possible values of the variable that lie between 7

and 15.

b. Find the percentage of all possible values of the variable that are at least 5.

c. Find the percentage of all possible values of the variable that are at most 3.

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