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The 2 Parameter Logistic Distribution 7 Formulas

Fred Schenkelberg
3 min readJan 29, 2018

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The 2 Parameter Logistic Distribution 7 Formulas

This is part of a short series on the common life data distributions.

The Logistic distribution is univariate continuous distribution. This short article focuses on 7 formulas of the Logistic Distribution.

If you want to know more about fitting a set of data to a distribution, well that is in another article.

It has the essential formulas that you may find useful when answering specific questions. Knowing a distribution’s set of parameters does provide, along with the right formulas, a quick means to answer a wide range of reliability related questions.

Parameters

The location parameter, μ, is the mean, median, and the mode.

The scale parameter, s, is always greater than zero and is proportional to the standard deviation.

Probability Density Function (PDF)

With -∞ ≥ t ≥ ∞ then the probability density function formula is:

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Fred Schenkelberg
Fred Schenkelberg

Written by Fred Schenkelberg

Reliability Engineering and Management Consultant focused on improving product reliability and increasing equipment availability.

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