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Data & decisions
What to do in the first hour with a new dataset, and how to decide when the numbers won't decide for you. Looking before calculating; expected value and the decisions it quietly gets wrong; the pictures that summary statistics can't show you.
What to do in the first hour with a new dataset, and how to decide when the numbers won't decide for you. Looking before calculating; expected value and the decisions it quietly gets wrong; the pictures that summary statistics can't show you.
2 pieces
Articles in Data & decisions
The textbook tool for choosing under uncertainty is a weighted average. Right for repeated choices; misleading for one-shots and anything you cannot survive getting wrong.
15 October 2022 Data exploration — why the first hour with the data decides the whole analysisFour datasets, identical statistics, four completely different stories. The case for looking before calculating, in one famous picture.
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