Question

You have two normally distributed populations:
Population A:
mean 50 standard deviation=12

Population B:
mean 75 standard deviation=15
the area under the normal curve is greatest in which scenario?
A. Area below 60 in Population B.
B. Area above 65 in Population A.
C. Area between 75 and 90 in population B
D. Area above 80 in population B
E. Area below a value of 25 in Population A?

Answer 1

Take note of the formula for the z-score.
\[z =\frac{x-mean}{sd}\]

Answer 2

Then, refer on teh z-table for the area to the left of z-score.