Random assignment to treatments will guarantee that treatment groups areexactly alike for experimental purposes.
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Q2: Increasing sample size will eliminate bias in
Q3: A friend who is not taking statistics
Q4: A placebo is designed to be identical
Q5: A study is an observational study if
Q6: A treatment is a particular combination of
Q8: Response bias occurs when responses are not
Q9: Stratified sampling does not involve simple random
Q10: If the sample size is small relative
Q11: In a well-designed experiment the treatments are
Q12: Variables are extraneous if their effects on
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