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...Chaudhury|first5=S.|date=2009|title=Hypothesis testing, type I and type II errors|journal=Industrial Psychiatry Journal|volume=18|issue=2|pages=127–131|doi=1 * [[False positives and false negatives]] ...

...f samples that would fall between 0, 1, 2, and 3 standard deviations above and below the actual value.]] ...|estimate]] (good guess) of that standard deviation taken from a [[Sample (statistics)|sample]] of the whole group. ...

{{for|statistics about Wikipedia|Wikipedia:Statistics}} ...al Distribution.png|thumb|upright=1.3|right|The [[normal distribution]] in Statistics]] ...