Mathematics · Statistics
Let μ and σ be the mean and standard deviation of a set of observations. If each observation is increased by 5, and the new mean and standard deviation are μ1 and σ1 respectively, then which of the following is correct?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1μ = μ 1 and σ < σ 1
- 2μ = μ 1 and σ = σ 1
- 3μ < μ 1 and σ = σ 1✓
- 4μ > μ 1 and σ = σ 1
Correct answer
μ < μ 1 and σ = σ 1
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