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Imagine a 2,000-acre park with picnic benches, trees, and a pond. Suppose it is publicly owned, and people are invited to enjoy its beauty. When the weather is nice, it is difficult to find parking, and the trash cans overflow with food wrappers on summer afternoons. Otherwise, it is a great place. The park is a common resource because
Population Variances
Measures of the spread or distribution of a set of data points in a population, quantifying the degree to which these points differ from the population mean.
Sample Variance
A measure of the dispersion or spread of a set of data points around their mean, calculated as the sum of the squared deviations from the mean, divided by the number of observations minus one.
Equal-variances Test
A statistical test used to determine if two or more samples have equal variances.
Unequal Variances Test
A statistical test used when comparing two groups that do not assume the variances of the groups are equal.
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