The Given Numbers Are Daily Groundwater Elevation Readings from a Monitoring

Multiple Choice

The given numbers are daily groundwater elevation readings from a monitoring well taken during a month experiencing snowmelt and extended rainfall events. 7.6, 7.7, 4.3, 5.9, 5.0, 10.5, 7.7, 9.5, 12.0, 12.6, 6.5, 8.3, 8.2, 13.2, 12.6, 13.6, 14.1, 13.5, 11.5, 12.0, 10.4, 10.8, 13.1, 12.5, 10.4, 13.0, 14.1, 15.1
What is the standard deviation of these groundwater elevation readings?

A) 3.01
B) 4.15
C) 9.08
D) None of the above.