Posted by Math help on .
Some IQ scores are standardized with a mean of 100 and a standard deviation of 16. Using the 689599.7 Rule, Determine: 1. What percent of people would have an IQ score of no more than 68. (2).What percent of people would have an IQ score of 100 or above.

Statistics 
drwls,
1. 68 is 2 sigma from the mean. 95% are within that distance of the mean, and 5% are outside it. Half of those (2.5%) are below it on the low side (below 68).
2. 50%. The mean always divides the distribution in that ratio: half above and half below.