THINKING, FAST & SLOW (DANIEL KAHNEMAN) - Listening books
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The Importance of Sample Size
Every one of the mistakes I had made was shared by a large majority of our respondents. It was evident that even the experts paid insufficient attention to sample size. A telephone poll of six or 60 million elderly voters would draw your attention. Unless you are a professional, however, you may not react very differently to a sample of 150 and to a samples of 3000.
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