Examlex
A key must be unique.
Means
Means refer to the average values of sets of data, calculated by summing all values and dividing by the number of data points.
≠ 0
Symbol indicating that a quantity or difference is not equal to zero, often used in hypotheses testing to signify a non-null effect.
Standard Error
The standard deviation of the sampling distribution of a statistic, often used to estimate the accuracy of sample mean as an approximation of the population mean.
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