Test: POST UNIT 2 - TEST - Ch. 3 Question 7 of 12 > Scores of an IQ test have a bell-shaped distribution with a mean of 100 and a standard deviation of 11 Use the empirical rule to determine the following (a) What percentage of people has an IQ score between 89 and 111? (b) What percentage of people has an IQ score less than 89 or greater than 111? (c) What percentage of people has an IQ score greater than 111? (a) % (Type an integer or a decimal.) (b) % (Type an integer or a decimal ) (c) % (Type an integer or a decimal )