Problem
Points: 0 of 1 Save 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. Identify the lower limit of the tenth class. \begin{tabular}{|c|c|} \hline \begin{tabular}{c} Number of Social \\ Interactions \end{tabular} & Frequency \\ \hline $25-29$ & 12 \\ \hline $30-34$ & 13 \\ \hline $35-39$ & 10 \\ \hline $40-44$ & 19 \\ \hline $45-49$ & 11 \\ \hline $50-54$ & 12 \\ \hline $55-59$ & 3 \\ \hline $60-64$ & 3 \\ \hline $65-69$ & 0 \\ \hline $70-74$ & 3 \\ \hline \end{tabular}
Solution
Step 1 ：The question is asking for the lower limit of the tenth class in the given frequency distribution.
Step 2 ：The classes are given in the first column of the table.
Step 3 ：The tenth class is the tenth row in the table.
Step 4 ：The lower limit of a class in a frequency distribution is the smallest value that can fall into that class.
Step 5 ：In this case, the classes are ranges of numbers, so the lower limit is the smaller number in the range.
Step 6 ：Final Answer: The lower limit of the tenth class is \( \boxed{70} \).
