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A variable is normally distributed with mean 9 and standard deviation of 2. a. Find the...

A variable is normally distributed with mean 9 and standard deviation of 2.

a. Find the percentage of all possible values of the variable that lie between 4 and 12.

b. Find the percentage of all possible values of the variable that exceed 7.

c. Find the percentage of all possible values of the variable that are less than 6.

math   Statistics-And-Probability   
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