From the table given,
To find the x - mean,
By the summation of all the x - mean
The value of x - mean is
![x-\operatorname{mean}=16+1-26-10+16=-3]()
Hence, the value of x - mean is -3
To find the (x - mean)²
By the summation of all the values of (x - mean)²
The value of (x - mean)² is
![(x-\operatorname{mean})^2=256+1+676+100+256=1289]()
Hence, the value of (x - mean)² is 1289