I don't understand how it's not 95%

mylab.pearson.com Extras v Top Surgery v Mercer v Research/Writing Registration ~ Study v Ethernet Career/Job club ideas v Housing/Leasing v MyLab and Mastering E Course Home P Do Homework - HW 3.2 P Do Homework - HW 3.2 At one point the average price of regular unleaded gasoline was $3.55 per gallon. Assume that the standard deviation price per gallon is $0.0 K the following. (a) What percentage of gasoline stations had prices within 3 standard deviations of the mean? (b) What percentage of gasoline stations had prices within 2.5 standard deviations of the mean? What are the gasoline prices that are within (c) What is the minimum percentage of gasoline stations that had prices between $3.43 and $3.67? (a) At least 88.89 % of gasoline stations had prices within 3 standard deviations of the mean. (Round to two decimal places as needed.) (b) At least 84 % of gasoline stations had prices within 2.5 standard deviations of the mean. (Round to two decimal places as needed.) The gasoline prices that are within 2.5 standard deviations of the mean are $ 3.4 to $ 3.7 . (Use ascending order.) (c) |% is the minimum percentage of gasoline stations that had prices between $3.43 and $3.67. (Round to two decimal places as needed.)