Examlex
Explain what progressive muscle relaxation is and how it works.
Tchebysheff's Theorem
A statistical theorem that specifies the minimum proportion of observations within a certain number of standard deviations from the mean for any distribution shape.
Empirical Rule
A statistical theorem stating that in the case of a normal distribution, almost entirely all the data will be situated within three standard deviations away from the average.
Population Mean
The average or central value of a set of numbers or measurements in the entire population under study.
Sample Mean
The average value of a sample set of numbers, which serves as an estimate of the population mean.
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