A set of n values x1, x2, ..., xn has standard deviation 6. The standard deviation of n values x1 + k, x2 + k, ..., xn + k will be
A set of n values x1, x2, ..., xn has standard deviation 6. The standard deviation of n values x1 + k, x2 + k, ..., xn + k will be
(A) σ
(B) σ + k
(C) σ – k
(D) kσ
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(A) is correct answer. If each observation is increased by a constant k, then standard deviation is unchanged
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