The following data set belongs to a population

Question

The following data set belongs to a population

5 -7 2 0 -9 18 10 7

what is the Range ?

what is the variance ?

what is the standard deviation ?

Answer 1

The range is the largest value (18) minus the smallest value (-9)

To compute the variance, you first need to compute the mean (26), which is the sum of all the values divided by the number of values (8).

Then you compute the square of the difference of each value from the mean, e.g., (5 - mean)^2. Then you add all those values up then divide by the number of values minus 1 (7)

The standard deviation is equal to the square root of the variance.