Why is an observational research design conducted?
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Q30: Ecological research design studies only be undertaken
Q31: The observational researcher should always randomly assign
Q32: Observational research examines the effects of exposure
Q33: An OR = 1 means exposure does
Q34: When data are collected on the exposure
Q35: The exposure variable in observational research could
Q36: How might external validity invalidate a study?
Q37: What does an ecological fallacy assume?
Q38: How are ethical issues associated with observational
Q39: In cross-sectional research, why can causality not
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