Q1: Below are the percentages of the population over 25 years of age who have completed 4 years of college or more for the 50 states and the District of Columbia. Find the mean, modal class and standard deviation. Percentage Frequency 15.2-19.6 19.7-24.1 15 24.2-28.6 28.7-33.1 33.2-37.6 37.7-42.1 42.2-46.6