Answer
The minimum is 52 seconds and the maximum is 72 seconds. Divide the data into 5 intervals:
51-55 seconds occurs 2 times.
56-60 seconds occurs 7 times.
61-65 occurs 2 times.
66-70 occurs 2 times.
71-75 occur 1 time
Work Step by Step
Draw a histogram to represent the frequency of each interval: