Mathematics · Probability and Statistics
For a normal distribution N(μ, σ2), which of the following statements are CORRECT? (A) The distribution is perfectly symmetric about the mean. (B) Mean = Median = Mode = μ. (C) β1 (skewness coefficient) = 0 and β2 (kurtosis) = 3. (D) The quartile deviation QD ≈ (2/3)σ approximately. Choose the correct answer:
- 1A and D only
- 2B and C only
- 3A, B and C only
- 4A, B, C and D✓
Correct answer
A, B, C and D
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