railway RRB Technician Grade 1 Mock Test 2024 Mathematics Statistics Variance and Standard Deviation
If the total number of observations is 20, ∑ xi = 1000 and \(\sum {\rm{x}}_{\rm{i}}^2 = 84000\), then what is the variance of the distribution?
1
1500
2
1600
3
1700
4
1800