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Edco 735 Statistics Week 1 Exam Updated Questions And Correct Answers

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EDCO 735 Statistics Week 1 Exam UPDATED QUESTIONS AND CORRECT ANSWERS Stratified random sampling is used to ensure: - CORRECT ANSWER groups equal representation of What percentage of scores are within one standard deviation from the mean? - CORRECT ANSWER 68.26 Nonexperimental studies tend to include: - CORRECT ANSWER variable assessment of the outcome Which of the following is not necessary for causal inference? - CORRECT ANSWER validity external What kind of sampling is most often used in social sciences research? - CORRECT ANSWER convenience sampling Without random assignment, what assumption may be violated? - CORRECT ANSWER equivalence of groups across treatment conditions

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EDCO 735 Statistics Week 1 Exam
UPDATED QUESTIONS AND CORRECT
ANSWERS
Stratified random sampling is used to ensure: - CORRECT ANSWER equal representation of
groups



What percentage of scores are within one standard deviation from the mean? - CORRECT ANSWER
68.26



Nonexperimental studies tend to include: - CORRECT ANSWER assessment of the outcome
variable



Which of the following is not necessary for causal inference? - CORRECT ANSWER external
validity



What kind of sampling is most often used in social sciences research? - CORRECT ANSWER
convenience sampling



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

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