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Distinguish Random Sampling from Random Assignment
Grade Level
Praxis Core
5165.219 Distinguish Random Sampling from Random Assignment
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Which design change converts an observational comparison into a randomized experiment? Identify the statement supported by the appropriate theorem.
A
Increase the sample size without assigning treatments.
B
Randomly assign experimental units to treatment conditions.
C
Report the association as a cause.
D
Choose only volunteers with strong opinions.
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