find the class limits. the first lower

Stories in the World's Tallest Buildings The number of stories in each of a sample of the world's 18 tallest buildings follows. Construct a grouped frequency distribution and a cumulative frequency distribution with 5 classes. 71 65 88 88 77 72 75 88 69 75 79 80 70 91 80 85 70 Send data to Excel Part 1 of 5 What is the class width for a frequency distribution with 5 classes? The class width is 6 Part: 1 / 5 Part 2 of 5 Find the class limits. The first lower class limit is 65. Class limits 65- X