Suppose the heights of the members of a population follow a normal distribution. If the mean height of the population is 68 inches and the standard deviation is 4 inches, 95% of the population will have a height within which of the following ranges?

A. 52 inches to 84 inches
B. 56 inches to 80 inches
C. 64 inches to 72 inches
D. 60 inches to 76 inches

Question

Suppose the heights of the members of a population follow a normal distribution. If the mean height of the population is 68 inches and the standard deviation is 4 inches, 95% of the population will have a height within which of the following ranges?

 		A.	52 inches to 84 inches
 		B.	56 inches to 80 inches
 		C.	64 inches to 72 inches
 		D.	60 inches to 76 inches

e.mccormick · Answer

Take another look at that normal curve chart.  See what is the 95% range.  That will tell you how many standard deviations above and below the average are in 95%.  Then you can take the average plus that many SDs for the high, and minus it for the low.