The Sample Variance $S ^ { 2 }$ Is an Unbiased Estimator of the Population Variance

question 42

Essay

The sample variance $S ^ { 2 }$ is an unbiased estimator of the population variance $\sigma ^ { 2 }$ that is, __________ = __________.

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Definitions:

Vegetarian

A dietary practice of abstaining from the consumption of meat and sometimes, by extension, other animal products.

Regression Discontinuity

Regression discontinuity identifies the causal effects of a policy or factor by looking at two samples that lie on either side of a threshold or cutoff.

Causal Effects

Causal effects refer to the change in an outcome directly attributable to a change in a factor or intervention, established through methods that isolate this relation from other variables.

Threshold

The point at which a particular effect or change occurs, often used in context of quantities or levels.