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Skew Normal Distribution

    Probability Density Function (PDF)
      EXPFORECASTStep3
    Cumulative Distribution Function (CDF)
      EXPFORECASTStep3
    where 𝜙(𝑥) and Φ(𝑥) are respectively the PDF and CDF of the standard normal distribution, and cdfbvn is the cumulative standardized bivariate normal distribution.
    Range -∞ < 𝑥 < ∞
    Location parameter, 𝜇
    Scale parameter 𝜎 > 0
    Skew parameter 𝛼, negative for left skew, positive for right skew

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