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.
1) 95%
2) 68%
3) 99.7%
4) 100%

Question

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.
	1)	95%
	2)	68%
	3)	99.7%
	4)	100%

inkyvoyd · Answer

2, because within one standard deviation we are talking about 34%, and coincidentally, that is a score of 85 and 100, or 100 and 115.