Tiny High School Has a Total Enrollment of 36 $\Sigma$ X = 90

Multiple Choice

Tiny High School has a total enrollment of 36. The Principal, interested in the variability of GPA's at THS, gathered the following data and calculated the appropriate standard deviation: N = 36, $\Sigma$ X = 90, $\Sigma$ X² = 233.64. Which answer is correct?

A) 0.25
B) 0.49
C) 0.50
D) none of the other alternatives are correct.