With experimental designs,blinding ensures that subjects in control and treatment conditions experience the placebo effect,but does not guard against confounding.
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Q13: Doubling the sample size will increase the
Q14: Doubling the sample size will increase the
Q15: Postal surveys are susceptible to non-response bias.
Q16: It is not possible to use ANCOVA
Q17: By randomly assigning subjects to treatment levels,randomization
Q19: In ANCOVA there should be one covariate
Q20: Random sampling is a good way to
Q21: In hypothesis testing,the p-value is computed from
Q22: In regression analysis,when the sum of the
Q23: The p-value is a probability.
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