Answer:
The variance of the values is: 14.4
Explanation:
The data is given as follows:
7, 5, 11, 1, 11
The total number of data points are: 5
The mean of the data values is given by:

Now,
x x-x' (x-x')²
7 7-7=0 0
5 5-7= -2 4
11 11-7=4 16
1 1-7= -6 36
11 11-7=4 16
The variance is given by:

Hence, Variance=14.4