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Definitions:

Significance Level

A threshold in hypothesis testing that defines the probability of rejecting a true null hypothesis, commonly denoted by alpha (α).

Test Statistic

A numerical value calculated from a sample used in statistical hypothesis testing to determine whether to reject the null hypothesis.

Normal Distribution

A probability distribution characterized by its symmetry surrounding the mean, demonstrating that data points close to the mean occur more frequently than those at a greater distance.

Degrees Of Freedom

Degrees Of Freedom represent the number of values in the final calculation of a statistic that are free to vary, often determining the shape of various sampling distributions.

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