Psychology / Unit 1 Psych 0103 short lesson, about 20 seconds
Statistical Significance
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The idea
A result is statistically significant when it is unlikely to have arisen by chance alone, under a threshold set before analysis.
In practice
The eight-hour group recalls four more words on average, a gap that would rarely appear if sleep made no difference.
Where people slip
Significance reports that a result is probably not noise, and nothing more.
Your place on the trail
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