Suppose a normal distribution has a mean of 38 and a standard deviation of 2. What is the probability that a data value is between 37 and 41? Round your answer to the nearest tenth of a percent.

A. 83.5%
B. 77.5%
C. 56.5%
D. 62.5%

Question

Suppose a normal distribution has a mean of 38 and a standard deviation of 2. What is the probability that a data value is between 37 and 41? Round your answer to the nearest tenth of a percent.

 		A.	83.5%
 		B.	77.5%
 		C.	56.5%
 		D.	62.5%

anonymous · Answer

|dw:1369710768492:dw| Find the z values, then look up the probability/area under the curve for those z values and add them together.