Question

The graph shows a distribution of data.

A graph shows the horizontal axis numbered 2.5 to x. The vertical axis is unnumbered. The graph shows an upward trend from 3.5 to 4 then a downward trend from 4 to 4.5.

What is the variance of the data?

0.0625
0.25
0.5
1.5

Answer 1

.0625 or A

Explanation:

You have to work out the mean. (The simple average of those numbers) Then for each number subtract the Mean and square the result. Then work out the average of those squared differences.