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Degrees of freedom
_____ refers to the number of scores in a sample that are free to vary with no restriction.
The distribution of sample means is almost perfectly normal if (1) the population from the which the samples are selected is a normal distribution and (2) the number of scores in each sample is relatively large, around ___ or more.
The ____ for a hypothesis is the probability that the test will lead to a Type I error.
The ___ of a statistical test is the probability that the test will correctly reject a false null hypothesis. That is, ___ is the probability that the test will identify a treatment effect if one really exists.
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