Question

In the data set, what is the variance? 6 8 1 9 4

Answer 1

variance=£x2/n - (£x/n)2

£ indicates summation of

£x2=36+64+1+81+16=198

£x= 6+8+1+9+4=28

= 198/5-(28/5)2

=198/5-784/25

=586/25

=8.56

Answer 2

Please have a look at the attachment for the solution of this question.