5) Adult IQ scores have a bell shaped distribution with a mean of 100 and a standard deviation of 15. a. Sketch the curve. Label the mean and 3 standard deviations above and below the mean. 55 70 85 100 115 130 145 b. Use the Empirical Rule to find the percentage of adults with scores between 70 and 130 c. An IQ score of 85 would represent what percentile of the population? d. Find the z-score for an IQ of 108 IV. 140 e. Are any of the IO's in part b unusual? if so, which ones