Question\begin{tabular}{|c|c|c|c|c|} \hline \multicolumn{5}{|c|}{ Test scores } \\ \hline 97 & 80 & 94 & 86 & 85 \\ \hline 96 & 80 & 83 & 84 & 95 \\ \hline 98 & 93 & 94 & 81 & 82 \\ \hline \end{tabular}
Send data to calculator (a) Complete the grouped frequency distribution for the data. (Note that the class width is 5.) \begin{tabular}{|cc|} \hline Test scores & Frequency \\ \hline 78.5 to 83.5 & 5 \\ 83.5 to 88.5 & 3 \\ 88.5 to 93.5 & 1 \\ 93.5 to 98.5 & 6 \\ \hline \end{tabular} (b) Using the classes from part (a), draw the frequency polygon for the data. Note that you can add or remove classes from the figure. Label each class with its midpoint.