Precalculus
posted by Lucy .
A set of data is normally distributed with a mean of 500 and a standard deviation of 40. What percent of the data is between 460 and 540?
Answer: 68.3%

Yes, that is the definition of a standard deviation.
posted by Lucy .
A set of data is normally distributed with a mean of 500 and a standard deviation of 40. What percent of the data is between 460 and 540?
Answer: 68.3%
Yes, that is the definition of a standard deviation.