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Population Standard Deviation
A measure of the dispersion of all values in the entire population from the mean of the population.
Confidence Interval
A range of values that is believed to contain an unknown population parameter, calculated from a given set of sample data.
Sample Variance
A statistical measure of the dispersion of observations in a sample dataset around the sample mean.
T Distribution
A family of probability distributions that can be used to develop an interval estimate of a population mean whenever the population standard deviation s is unknown and is estimated by the sample standard deviation s.
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