Consider a sample involving 120 people phone habits. A researcher collected data pertaining to the number of calls made by each of person in the sample on a Tuesday from 9am - 5pm. The first five numbers were { 12, 4, 19, 33, 21, } The largest and smallest number of phone calls were 101 and 3. If a Frequency Distribution is to be made with 6 classes, what value would be the upper limit of the 4th class?
72
71
70
66
58