Question

Researchers conducted a randomized, double-blind clinical trial to compare the herb St. John's Select one wet Wort, the antidepressant drug sertraline, and a placebo for the treatment of depression of the 10 points 113 patients in the herb treatment group, 23.9% showed improvement, compared to 24.8% of the 113 in the sertraline group and 31.9% of the 113 patients in the placebo group. Medscape Medical Newspublished this research in 2002. Is a normal model a good fit for the sampling distribution? A. Yes, the sample sizes are large and there are equal numbers in each treatment group. B. Yes, there are at least 10 people who improved and 10 who did not improve in each randomized treatment group C. No, there are not at least 10 successes and failures in each group. D. No, we do not know if the researchers used random assignment to create treatment groups.

Answer 1

1. Option B

2. Option C

3. Option C

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