Examlex
Which hormone has been associated with feelings of closeness to others?
Mean of a Sample
The average value obtained by dividing the sum of all observations in a sample by the number of observations.
Mean of a Population
The average value derived from adding all the values in a population and then dividing by the number of values.
Null Hypothesis
A default hypothesis that there is no effect or no difference, used as a starting point for statistical significance testing.
One-sample Z-test
A statistical test used to determine if the mean of a single sample differs significantly from a known or hypothesized population mean.
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