Problem
A professor had students keep track of their social interactions for a week. The number of social interactions over the week is shown in the following grouped frequency distribution. What is the class width? \begin{tabular}{|c|c|} \hline \begin{tabular}{c} Number of Social \\ Interactions \end{tabular} & Frequencies \\ \hline $25-31$ & 5 \\ \hline $32-38$ & 14 \\ \hline $39-45$ & 13 \\ \hline $46-52$ & 19 \\ \hline $53-59$ & 16 \\ \hline $60-66$ & 12 \\ \hline $67-73$ & 3 \\ \hline $74-80$ & 4 \\ \hline $81-87$ & 1 \\ \hline $88-94$ & 4 \\ \hline \end{tabular}
Solution
Step 1 ：The class width in a frequency distribution table is the difference between the upper and lower boundaries of any class or group.
Step 2 ：In this case, we can calculate the class width by subtracting the lower limit of a class from the upper limit of the same class.
Step 3 ：Let's take the first class as an example. The upper limit is 31 and the lower limit is 25.
Step 4 ：Subtract the lower limit from the upper limit: \(31 - 25 = 6\)
Step 5 ：So, the class width is \(\boxed{6}\)
