Economics · Statistics
Which one of the following is NOT a correct formula for Standard Deviation (σ)?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1σ = √Σd2 − N(X − A)2N
- 2σ = √Σd2N − (X − A)2
- 3σ = 1N√Σd2 − (Σd)2✓
- 4σ = √Σd2N − (ΣdN)2
Correct answer
σ = 1N√Σd2 − (Σd)2
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