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4 Cards in this Set
- Front
- Back
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Experimental versus quasi-experimental |
Experiments involve random assignment to treatment conditions, quasi compared two naturally occurring group (no random assignment) not always plausible to conclude that group differences on the DV are caused by group membership, but it is plausible in experiments |
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Hypothetical Population |
One that does not exist, but which could exist. Individuals in an experiment that undergo a novel treatment can be considered a sample from a hypothetical population of all individuals that undergo the same treatment. |
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Confounding Variables |
An uncontrolled variable that affects the scores in our sample differently. |
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The sampling distribution of the difference between two means |
The probability distribution of all possible differences between two sample means, m1 and m2, of size n1 and n2, respectively, drawn at random from two independent populations. The sampling distribution of all possible values of m1-m2 |
