Question

A student has the following grades: 86, 80, 79, 85, 70. Find the standard deviation of the grades.
1) 1640.5
2) 5.69
3) 40.5
4) 32.4

Answer 1

sd = sqrt(variance)

Answer 2

\[\sigma = \sqrt{\frac{\sum (x-\mu)^2}{n}}\]

Answer 3

@tana Should you just enter into the calculator, use the Stat - var char option!

Answer 4

its 32.4

Answer 5

I don't have the appropriate calculator now!

Answer 6

its the sqrt(32.4)