Assume that a set of test scores is normally distributed with a mean of 80 and a standard deviation of 15. Use the 68-95-99.7 rule to find the following quantities. a. The percentage of scores less than 80 is 50%. (Round to one decimal place as needed.) b. The percentage of scores greater than 95 is 16.0%. (Round to one decimal place as needed.) c. The percentage of scores between 50 and 95 is nothing%.