Question

Scores on the GRE? (Graduate Record? Examination) are normally distributed with a mean of 520 and a standard deviation of 144. Use the 68-95 99.7 Rule to find the percentage of people taking the test who score between232 and 808.

The percentage of people taking the test who score between 232 and 808 is _______%.

Answer 1

232 = 520 - 2*144

and

808 = 520 + 2*144

which means scores between 232 and 808 fall within 2 standard deviations of the mean, so about 95% of scores fall in this range.