Alan is taking a self-paced math class. His scores for each of the quizzes during the academic year are shown below. Complete the grouped relative frequency distribution for the data. (Note that we are using a class width of 6 ) Write each relative frequency as a decimal rounded to the nearest hundredth, not as a percentage. quiz scores 78,77,70,70,80,72,78,79,78, 75,82,72,76,66,79,84,85,81,78 quiz scores 66 to 71, 72 to 77 , 78 to 83, 84 to 89