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A variable is normally distributed with mean 12 and standard deviation 2. a. Determine the quartiles of the variable. Q1? Q2? Q3? b. Obtain and

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A variable is normally distributed with mean 12 and standard deviation 2.

a. Determine the quartiles of the variable.

Q1? Q2? Q3?

b. Obtain and interpret the 80th percentile.

c. Find the value that?65% of all possible values of the variable exceed.

d.Find the two values that divide the area under the corresponding normal curve into a

middle area of 0.95 and two outside areas of 0.025. Interpret the answer.

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