defence exam ITBP (Telecommunication) Head Constable Mock Test 2024 Mathematics Statistics Variance and Standard Deviation
A set of n values x1, x2,..., xn has standard deviation σ. What is the standard deviation of n values x1 + k, x2 + k,..., xn + k ?
1
σ
2
σ + k
3
σ - k
4
kσ