Examlex
What is a placebo group and why is it important to include such a group in a multigroup design?
Standard Error
A measure that describes the distribution of sample means around the population mean in a sampling distribution.
Standard Deviation
A measure of the amount of variation or dispersion of a set of values; indicates how much the values in a data set differ from the mean.
Variability
A measure of how much scores in a data set differ from each other and from the mean, indicating the spread or dispersion of the data points.
Sample Means
The arithmetic average of a set of values or measurements taken from a sample of a larger population.
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