Properties of Normal Distribution
For a normally distributed data set with a mean of 70 and a standard deviation of 5, which of the following statements is true?
AApproximately 95.5% of the data lie between 55 and 85.
BApproximately 95% of the data lie between 60 and 80.
CNone of these statements is true.
DApproximately 68% of the data lie between 50 and 90.