Examlex
A recent study of the relationship between social activity and education showed the following results. The degrees of freedom for the analysis is:
Null Hypothesis
A hypothesis that states there is no effect or no difference, and it serves as the default assumption to be tested in hypothesis testing.
Difference Score
The result of subtracting one quantity from another, often used to measure change or effects in experimental designs.
T-test
A statistical test used to determine if there is a significant difference between the means of two groups, which may be related in certain features.
Critical Value
A threshold value in statistical testing used to determine whether to reject the null hypothesis.
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