Part 1 of 3 O Points: 0 of 1 Scores of an IQ test have a bell-shaped distribution with a mean of 100 and a standard deviation of 15. Use the empirical rule to determine the following. (a) What percentage of people has an IQ score between 55 and 145? (b) What percentage of people has an IQ score less than 70 or greater than 130? (c) What percentage of people has an IQ score greater than 130? .. ... (a) % (Type an integer or a decimal.) Video Textbook Get More Help - Clear All Check Answ