Question

A distribution reasonably well described by the normal curve has a mean of 60.00 with a standard deviation of 10.00 points. basing your prediction on the normal (z) curve, approximately what percent of the population would you predict will score within 10.00 points of the mean (between 50.00 and 70.00)?

Answer 1

68% will be within 10 points of the mean.

The empirical rule states that 68% of data will fall within 1 standard deviation of the mean. 10 is the standard deviation, so anything within 10 points of the mean is within 1 standard deviation.

Answer 2

68%

Explanation: