Beta Distribution with Minimum and Maximum
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Probability Density Function (PDF)
-
Cumulative Distribution Function (CDF)
- where 𝐵 is the Beta function.
-
• Range 𝜃1 ≤ 𝑥 < 𝜃2
• Shape1 parameter 𝛼 > 0
• Shape2 parameter 𝛽 > 0
• Minimum (lower threshold) 𝜃1
• Maximum (upper threshold) 𝜃2
- Notes: Estimation of the 4 parameter Beta distribution is undertaken in two parts. In the first part,
initial parameter estimates are derived using the method of moments. The threshold parameters
are then held using these values, and the shape parameters are then estimated using maximum
likelihood.
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