Explanation : Use the following keystrokes to calculate the population variance:
[2nd] [DATA]
[2nd] [CLR WRK] X01 = 10.5
X02 = 16.25
X03 = 27
X04 = 12
X05 = 7.8
Choose the population standard deviation: σ = 6.723. Then square
it, to get population variance as 45.2.