IQ scores are normally distributed with a mean of 100 and a standard deviation of 15
a. what percent of IQ scores are between 85-115?

Question

IQ scores are normally distributed with a mean of 100 and a standard deviation of 15
a. what percent of IQ scores are between 85-115?

yanasidlinskiy · Answer

|dw:1466307949068:dw| If this drawing is not clear, let me know:) What I did was have 100 as the mean and 15 as the standard deviation. As you can see, I put 100 down and added 15 to the right side and continued on just like the Empirical Rule:) And on the left I subtracted the standard deviation from the mean to get your left side:) Now to find out, what 2 numbers lie within the measurements given? https://www.google.com/search?q=empirical+rule&biw=1242&bih=606&tbm=isch&tbo=u&source=univ&sa=X&sqi=2&ved=0ahUKEwjD9_jIl7PNAhVMMyYKHZZnDDsQsAQIGw&dpr=1.1#imgrc=wnhbLeLD4LCaJM%3A