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Sample Size
The number of observations or data points collected or selected from a population for the purpose of statistical analysis.
Degrees of Freedom
The number of independent pieces of information in a dataset that are available for estimating another piece of information or parameter.
Confidence Interval
A band of values, derived from the statistical examination of samples, presumed to include the value of an unascertained population parameter.
T-Distribution
A probability distribution used in statistics that is applicable when the sample size is small and the population variance is unknown.
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