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An experiment investigates a dietary approach to treating anxiety disorder Researchers randomly assigned 29 subjects...

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An experiment investigates a dietary approach to treating anxiety disorder Researchers randomly assigned 29 subjects to two treatment groups one taking a high dose of vitamin c and the other a placebo Complete parts a and b below a Why was it important to randomize in assigning the subjects to the two groups A It eliminates the effects of unknown or uncontrollable sources of variation B It assures that the experiment is controlled C It should equalize the effects of unknown or uncontrollable sources of variation D It makes conditions as similar as possible for all treatment groups b What would be the advantages and disadvantages of using 100 subjects instead of 29 A It would take more time and be more controlled but random assignment is more difficult with more subjects B It would maximize the impact of individual variability in the responses but it would be a more costly and time consuming experiment C It would minimize the impact of individual variability in the responses but it would be a more costly and time consuming experiment OD It would assure that the subjects are randomly assigned but it would cause too much variability in the results

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