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

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

amistre64 · Answer

100+15 = 115; so its within 1 sd to the right = 34%
100-15 = 85 ; 1sd to the left is 34%

68% total

anonymous · Answer

Thanks I will be sure to give you a medal! I now know why they call you Group Master! You have been the best help! Have a great day!

amistre64 · Answer

lol  thnx :)