IM3.7.8 Exit Ticket

On the Wechsler Adult Intelligence Scale, an average IQ is 100 with a standard deviation of 15 units. (Source: http://en.wikipedia.org/wiki/Intelligence_quotient) 8. IQ scores between 90 and 109 are considered average. Assuming IQ scores follow a Normal distribution, what percent of people are considered average? 9. One measure of Genius is an IQ score of above 135. What percent of people are considered genius? 10. Einstein had an IQ score of 160. What is his z-score? 11. What is the probability of an individual having a higher IQ than Einstein?

Above is a histogram of Mrs. Hader's math class's scores. 1. Is this distribution normal? Explain. 2. If Mrs. Hader were going to predict her total pass rate using only second period, would she have a good prediction? Explain.