Teaching Haryana (HPSC) PGT Mock Test 2024 Quantitative Aptitude Elementary Statistics

The standard deviation of data x₁, x₂, x₃, …, x_n is σ(σ > 0). Then the standard deviation of data 3x₁ + 2, 3x₂ + 2, 3x₃ + 2, …, 3x_n + 2 is

1

3σ

2

σ

3

3σ + 2

4

9σ

5

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