# Question

The manager at a water park constructed the following frequency distribution to summarize attendance for 60 days in July and August.
Attendance ...... Frequency
1,000 up to 1,250 ..... 5
1,250 up to 1,500 ..... 6
1,500 up to 1,750 ..... 10
1,750 up to 2,000 ..... 20
2,000 up to 2,250 ..... 15
2,250 up to 2,500 ..... 4

a. Calculate the mean attendance.
b. Calculate the variance and the standard deviation.

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