Question

The test scores for a math class are shown below

83,85,82,93,83,84,95,87,86,94

what is the standard deviation of the data set?

Answer 1

takes too long
calculate mean, the sum/10
calculate (x-mean)^2 for each x
add them
divide by 10
take the square root

Answer 2

30.88

Answer 3

That's wrong

Answer 4

4.6