Weibull Distribution is a continuous Probability Distribution. It provides accurate failure analysis and risk predictions with extremely small samples using a simple and useful graphical plot. The below formula used to calculate Weibull Distribution,

 P(X1 < X < X2) = e-(X1/β)α – e-(X2/β)α

Mean: μ = βΓ(1 + 1/α)

<>bMedian: = β(LN(2))1/α (Natural log of 2)

mode = β(1 – 1/α)1/α

Variance: σ2 = β2[Γ(1 + 2/α) – Γ(1 + 1/α)2]

Note: Value α & β must be Positive.