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Free blacks in the South
Test Statistic
A calculated value from sample data that is used in a hypothesis test to determine whether to reject the null hypothesis, based on some statistical model.
Confidence Limit
The range within which a population parameter is estimated to lie with a certain confidence level.
Population Variances
The measure of the spread of a population's data points from their mean.
Sample Variances
The measure of variability that quantifies the spread of data points in a sample dataset around the mean.
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