February 2025

Multivariate Base Rates of Low Scores Are Percentile Ranks: True or False?

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By Dr. Bob Uttl (February 17, 2025) It is better to keep your mouth shut and appear stupid than to open it and remove all doubt. Mark Twain In elementary statistical textbooks, high school pupils are often asked to solve questions such as: What is the probability of rolling at least one 1 on a …

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Dr. Mary Westcott’s Apophenia: Seeing Meaning In Randomness

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By Dr. Bob Uttl (February 14, 2025) apophenia : the tendency to perceive a connection or meaningful pattern between unrelated or random things https://www.merriam-webster.com/dictionary/apophenia Dr. Mary Westcott, supervised by Dr. Allan Mandel, President and owner of Mandel & Associates Ltd., had her technicians administer Ms. T fifteen test/test batteries that yielded over 1/2 thousand scores. Among …

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