Practice problem

Cumulative Frequency Table

+3 contributors

Contributors

Elise Molinaro
Sarah Walker
Alex Federspiel
Jonathan Heller

Test grades of 83%, 92%, 71%, 100%, 99%, 88%, 79%, 87%, 84%, 97%, 77%, 73% — Image by 1681551 via Pixabay (License)

Grading Scale

\begin{array}{|c|c|} \hline \text{Grade}&\text{Percent}\\ \hline A&90-100\\ B&80-90\\ C&70-80\\ \hline \end{array}

Marissa is a teacher aid for her favorite Algebra teacher. She is helping her out by grading some of the most recent tests. Using the grading scale above, construct a cumulative frequency table and determine how many people scored a B or above?