Examlex
The three basic tools the Fed uses to manage the money supply are reserve requirements, open-market operations, and the discount rate.
Standard Deviation
A measure that quantifies the amount of variation or dispersion of a set of data values from the mean.
Variance
A measure of variability that describes the spread of a data set or distribution, calculated as the average of the squared differences from the mean.
Population Parameter
A numerical value that represents a characteristic of an entire population, such as its mean or variance.
Sample Statistic
A numerical value calculated from a subset (sample) of a population, used to estimate the characteristics of the entire population.
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