Why do we randomize treatments to the different genotypes?Group of answer choicesStratified randomization prevents imbalance between treatment groups for known factors that influence prognosis or treatment responsiveness.Stratified random sampling captures key population characteristics in the sample.Stratified random sampling includes minimizing sample selection bias, such as differences in environmental conditions prior to the experiment.All these are advantages of randomizing plants to treatments.
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During planning a randomized trial, researchers are particularly concerned that age is a prognostic variable. That is, the prognosis for the disease under consideration is much worse in older patients. A good solution would be to do (choose one best answer): - factorial randomization - masked randomization - stratified randomization - cross-over randomization - outcome randomization
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The purpose of stratified random sampling is to make certain that, Select one: The sample proportionately represents individuals from different categories of the population. The participants chosen for the study are the ones most likely to react to the treatment. The sample is more representative of the actual population than the accessible population. None of the above
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What are the TWO main purposes of randomization? (Select TWO.) A. To eliminate bias in assignment to a treatment group B. To achieve baseline comparability between the intervention and comparison (control) groups, i.e. to make the groups being compared similar with respect to known and unknown confounders. C. To avoid the problem of random error. D. To enhance the predictive value of the study.
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