Statistical Thinking : archive
Date : July 2012

Random Variables: Why bother?

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Published on: July 14, 2012

Random variables and their probability distributions are the basis of inferential statistics. 1. In the exploration of most concepts in life and in science, they can be characterised as one of two types of processes: A. Deterministic Processes. B. Random Processes. Random processes produce random variable. The random variable is also referred to as a[…]

Understanding Mathematical Expectation.

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Published on: July 13, 2012

The idea of expectation in statistics is different from the ordinary use of the word.[in the sense it can take values that don’t make sense in the ordinary usage such as 2.5 children]. Expected value is the average value of a random variable. It also differs from probability: Probability is the the chance of an[…]

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