Answer:
The variance is 8.24
Explanation:
we have
set of data
![[6, 8, 1, 9,4]](https://img.qammunity.org/2020/formulas/mathematics/middle-school/jv7igbeta5akbd3duprgk08lo9ze070be4.png)
step 1
Find the mean
Adds the values and divide by the number of values
![[6+8+1+9+4]/5=28/5=5.6](https://img.qammunity.org/2020/formulas/mathematics/middle-school/6gcs1kp5k5b5u1h4v9h7plszq32dhr954z.png)
step 2
for each number: subtract the Mean and square the result

step 3
work out the mean of those squared differences
----> this value is called the "Variance"