A CFO is looking at how much of a company's resources are spent on computing.He samples companies in the pharmaceutical industry and develops the following stem-and-leaf graph. $\begin{array} { l l }
5 & 269 \
6 & 255568999 \
7 & 11224557789 \
8 & 001222458 \
9 & 02455679 \
10 & 1556 \
11 & 137 \
12 & \
13 & 255
\end{array}$
If you were creating a frequency histogram using these data,how many classes would you create?
A)4
B)5
C)6
D)7
E)8

Question

A CFO is looking at how much of a company's resources are spent on computing.He samples companies in the pharmaceutical industry and develops the following stem-and-leaf graph. $\begin{array} { l l } 
5 & 269 \
6 & 255568999 \
7 & 11224557789 \
8 & 001222458 \
9 & 02455679 \
10 & 1556 \
11 & 137 \
12 & \
13 & 255
\end{array}$
If you were creating a frequency histogram using these data,how many classes would you create?
A)4
B)5
C)6
D)7
E)8

Quizplus · Accepted Answer

The data ranges from 52 to 132, which is a range of 80. Using the Sturges' formula for determining the number of classes, $ k = 1 + 3.322 \log(n) $, where $ n $ is the number of data points (in this case, 50), we get approximately 6 classes.

A CFO Is Looking at How Much of a Company's