Question

Iq scores follow a normal distribution with mean 100 and standard deviation 15. give 100 random city college students a standard iq test. how many will score between 85 and 115?

Answer 1

About 68% of the people will score between 85 and 115.

The values of 85 and 115 are exactly 15 points away, or 1 standard deviation, away from the mean.

According to the empirical rule, about 68% of the values in a normal distribution are within 1 standard deviation of the mean.