A CFO is looking at what percentage of a company's resources are spent on computing. He samples companies in the pharmaceutical industry and develops the following stem-and-leaf display (leaf unit = 0.1). What would be the class length used in creating a frequency histogram?
A) 1.4
B) 8.3
C) 1.2
D) 1.7
E) 0.9

Question

A CFO is looking at what percentage of a company's resources are spent on computing. He samples companies in the pharmaceutical industry and develops the following stem-and-leaf display (leaf unit = 0.1).  What would be the class length used in creating a frequency histogram?
A) 1.4 
B) 8.3 
C) 1.2 
D) 1.7 
E) 0.9

Quizplus · Accepted Answer

There are 50 data measurements. 2^k, where k = number of classes and 2^k is the closest value larger than 50. 2⁶ = 64, so 6 classes. Class length = (Max value − Min value)/6 = (13.5 − 5.2)/6. Length = 1.38, rounded to 1.4.

A CFO Is Looking at What Percentage of a Company's