Answer


Interval - HoursFrequencyRelative FrequencyCumulative Relative Frequency
18 - 2012.5100.0
15 - 1700.097.5
12 - 1437.597.5
9 - 11922.590.0
6 - 81742.567.5
3 - 5615.025.0
0 - 2410.010.0



Graphs for the Above Data


Histogram



Frequency Polygon



Ogive




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