Examlex
Solitary play and onlooker play can both be categorized as
Standard Error
The standard deviation of the sampling distribution of a statistic, typically the mean, reflecting the variation of the sampling statistic over different samples.
Mean
The arithmetic average of a set of numbers, obtained by dividing the sum of these numbers by their quantity.
Z-statistic
A statistic used to determine the difference between an observed statistic and its hypothesized population parameter, measured in units of the standard deviation.
Two-tailed Test
A statistical test hypothesis that allows for the possibility of an effect in two directions, either greater than or less than.
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