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In which of the following years was Medicare added to the Social Security system?
Variance
A measure of the dispersion of a set of data points around their mean value, indicating how spread out the data points are.
Standard Deviation
A measure of the dispersion or spread of a set of values, calculated as the square root of the variance, indicating how much the values deviate from the mean.
Standard Deviation
An assessment of how much the values in a group differ or spread out.
Variance
A metric indicating how spread out a group of numbers is, determined by the mean of the squared deviations from the average.
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