In a certain study, mean symptom score (a measurement variable)…

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Question Answered step-by-step In a certain study, mean symptom score (a measurement variable)… In a certain study, mean symptom score (a measurement variable) ± standard deviation were: 0.75 ± 0. 35 (Placebo) and 0.55 ± 0.40 (for treated condition). There were 225 and 205 participants in placebo and the treated condition group respectively.(a) [Points=2+2] Compute 95% confidence interval for the mean symptom scores in each of the above two groups. Show your calculations of margins of error and the intervals.(b) [Point=1] Interpret the interval for the placebo group only. (c) [Points=2] For the treated condition group only: if you need to reduce the margin of error by one fourth (i.e., the new margin of error = 0.75 x margin of error in part (a)) , what should thesample size? Math Statistics and Probability STA 201 Share QuestionEmailCopy link Comments (0)