For Statistics Professionals: Why 30?

Sep 04 2017

What is the minimum number of data points recommended to estimate standard deviation? This is one of the most common questions posed to statistical professionals. The common answer from most statistical professionals is “30.” So, why 30?
To answer the “Why 30?” question, read this brief discussion on the use of statistics to estimate population parameters: www.astm.org/standardization-news/data-points/why-30-ja17.html

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