Examlex
Which of these represents Piaget's concept of "conservation"?
Matched Pairs
A study design where subjects are paired based on certain characteristics, and each pair differs by the factor being tested.
Test Statistic
A value calculated from sample data used to evaluate the validity of a hypothesis in statistical tests.
Degrees of Freedom
Refers to the count of values in the final calculation of a statistic that are free to vary.
Student T-distribution
A probability distribution that is used for estimating population parameters when the sample size is small and the population variance is unknown.
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