medium · SAT Math
A librarian recorded how many minutes each of 32 patrons spent in the reading room one weekday afternoon, grouping the times into 10-minute intervals. The histogram below shows the results. Time in reading room (minutes) : Frequency (number of patrons) 10-19 : 5 20-29 : 11 30-39 : 9 40-49 : 5 50-59 : 2 Total: 32 patrons Which interval is the modal interval (the interval containing the most patrons) for time spent in the reading room?
- 10-19 minutes
- 30-39 minutes
- 40-49 minutes
- 20-29 minutes
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