Adult IQ scores have a bell-shaped distribution with a mean of 100 and a standard deviation of 15. Use the Empirical Rule to find the percentage of adults with scores between 85 and 115.

Question

anonymous · Answer

1 standard deviation in either direction is plus or minus 34.1 percent.  You clearly have a standard deviation in both directions so you're percentage of adults with scores between 85 and 115 is 34.1% times 2.

anonymous · Answer

thanks