Question

In the data set below, what is the variance? 9 8 9 5 9 If the answer is a decimal, round it to the nearest tenth. variance (σ2):

Answer 1

Answer:

2.4

Step-by-step explanation:

We would first calculate the mean, because we would need it to calculate our varance.

Mean= sum of the number of given data set/ total number

Mean = (9 +8 +9 +5 +9 )/5

= 40/5= 8

variance (σ2):= [(9-8)^2 + (8-8)^2 + (9-8)^2 +(5-8)^2 +(9-8)^2]/5

=( 1+ 0 + 1 +9 +1)/5

= 12/5

variance (σ2)= 12/5

=2.4