Why Does an Observational Study Have a Greater Risk of Selection

question 31

Multiple Choice

Why does an observational study have a greater risk of selection bias than an experimental study?

• A) it does not do random sampling in every case
• B) posttest measurement is not done by the study
• C) There is no random assignment of an independent variable.
• D) it may have missing or incomplete data

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A systematic approach to identifying opportunities, developing marketing strategies, and implementing actions to achieve long-term marketing goals.

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