A Chemistry Class Takes a Survey of the Number of Hours

question 23

Multiple Choice

A chemistry class takes a survey of the number of hours they studied for an exam and the exam score. Of the students who studied less than two hours, 8 students got a score below 60, 3 students got a score between 60 and 80, and 1 above 80. Of the students who studied two to four hours, 3 students got a score below 60, 5 between 60 and 80, and 5 above 80. Of the students who studied more than four hours, 2 student got a score below 60, 1 between 60 and 80, and 4 above 80. Which of the following matrices organizes this data with the columns representing the number of hours students studied and the rows representing the exam score.

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