Use the given minimum and maximum data entries, and the number of classes, to find the class width, the lower class limits, and the upper class limits:
minimum = 7, maximum = 81, 7 classes
(a) The class width is 11
(b) Use the minimum as the first lower class limit, and then find the remaining class limits. The lower
class limits are 7,18,29,40,51,62,7
(HINT: Enter a comma separated list like "1, 2, 3..." and so on.)
(c) The upper class limits are 17,28,39,50,61,72
(HINT: Enter a comma separated list like "1, 2, 3..." and so on.)