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EDCO 735 Statistics Week 1 Quiz with Solutions

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EDCO 735 Statistics Week 1 Quiz with Solutions

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EDCO 735 Statistics Week 1 Quiz with Solutions

Which of the following is not necessary for causal inference? Correct Ans-external validity




What kind of sampling is most often used in social sciences research? Correct Ans-
convenience sampling




Without random assignment, what assumption may be violated? Correct Ans-equivalence
of groups across treatment conditions




Stratified random sampling is used to ensure: Correct Ans-equal representation of groups




What percentage of scores are within one standard deviation from the mean? Correct Ans-
68.26




Nonexperimental studies tend to include: Correct Ans-assessment of the outcome variable

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