Practice problem

Cumulative Frequency Table

+3 contributors

Contributors

Elise Molinaro
Sarah Walker
Alex Federspiel
Jonathan Heller

1 star car has a frequency of 18. 2 star car has 31. 3 star car has 43. 4 star car has ?. 5 star car has 39. — Image Sources: First car by Clker-Free-Vector-Images via Pixabay (License)

Second car by guigaman via Pixabay (License)

Third car by OpenClipart-Vectors via Pixabay (License)

Fourth car by OpenClipart-Vectors via Pixabay (License)

Fifth car by Clker-Free-Vector-Images via Pixabay (License)

\begin{array}{|l|c|c|} \hline \text{Cool Kid Rating}&\text{Frequency}&\text{Cumulative Frequency}\\ \hline ★&18&18\\ ★★&31&49\\ ★★★&43&92\\ ★★★★&?&132\\ ★★★★★&39&171\\ \hline \end{array}

Consider the cars and Cool Kid Ratings above ( $1-5$ stars). Using the cumulative frequency table above, determine how many cars have at lease a $3$ star Cool Kid Rating.