If each of the observations x1, x2, x3, ⋯,xn is increased by an amou – InterviewSolution

1.	If each of the observations x1, x2, x3, ⋯,xn is increased by an amount a, where a is a negative or positive number, then show that the variance remains unchanged.
Answer» If each of the observations $x_{1}, x_{2}, x_{3}, \dots, x_{n}$ is increased by an amount a, where a is a negative or positive number, then show that the variance remains unchanged.

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