What is the variance for the following population of scores? scores: 5, 2, 5, 4

Solution: 

Given the scores 5, 2, 5, 4

Variation is the squared variation of the given values from its mean.

Mean = sum of elements/ total number of elements

Mean μ = (5+2+5+4)/ 4= 4

xᵢ - μ= 1, -2,1,0

V =∑(xᵢ-μ)²/ n

=1² + (-2)² + 1²

= [1+4+1]/4

=6/4

=1.5

Variance =1.5

What is the variance for the following population of scores? scores: 5, 2, 5, 4

Summary:

The variance for the following population of scores: 5, 2, 5, 4 is 1.5.