Elementary Statistical Methods - 1342 - 402 Homework: 3.2 ti Score: 0 of 1 pt 9 of 20 (17 complete) HW Score: 71.67%, 14.33 3.2.31 Question Help Scores of an IQ test have a bell-shaped distribution with a mean of 100 and a standard deviation of 20. Use the empirical rule to determine the following. (a) What percentage of people has an IQ score between 60 and 140? (b) What percentage of people has an IQ score less than 80 or greater than 120? (c) What percentage of people has an IQ score greater than 160? boo (a) % (Type an integer or a decimal.) urce otes