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Levels of reliability methods
There are different levels of reliability analysis, which can be used in any design methodology…
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Reliability Analysis
Reliability analysis refers to the fact that a scale should consistently reflect the construct it is…
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What is a Lognormal Distribution?
A lognormal (log-normal or Galton) distribution is a probability distribution with a normally distributed logarithm.…
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The Poisson Distribution and Poisson Process Explained
A tragedy of statistics in most schools is how dull it’s made. Teachers spend hours…
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Chebyshev’s Theorem
What is Chebyshev’s Theorem? Chebyshev’s theorem is used to find the proportion of observations you would expect to…
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Probability Mass Function
For discrete random variables, the PMF is also called the probability distribution. Thus, when asked to…
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What Is a Random Variable?
If you have ever taken an algebra class, you probably learned about different variables like x, y and…
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Bayes’ Theorem Definition
What is the Bayes' Theorem? Bayes' theorem, named after 18th-century British mathematician Thomas Bayes, is a…