The efficacy of a new addiction medication was evaluated in a randomized, placeb

Question

The efficacy of a new addiction medication was evaluated in a randomized, placebo-controlled, doubleblind study. The medication in question, Antaquil, is intended to moderate the symptoms of alcohol withdrawal and craving with minimum side effects. Over the course of three weeks, a sample of 36 individuals who were recovering from alcohol addiction were randomly assigned to two groups: one administered the medication and one administered a placebo. At the end of the designated period, participants were administered the Obsessive Compulsive Drinking Scale (OCDS), an instrument that provides a global measure of thoughts about alcohol during nondrinking periods. Scores can range from 0 to 40 with higher scores signaling higher levels of rumination about alcohol. Prior to participation participants were all informed of the nature of Antaquil and were told they could leave the study at any time. Indicate the null hypothesis and the alternative hypothesis. State your understanding of what the hypotheses mean.

Explanation / Answer

1)

Null hypothesis: There is no diffeerence between the averager OCDS scores of two treatments.

Alternative hypothesis: Average OCDS score of the group administered with medication are more.

2)

for the better efficacy of the new medicine we choose the alternative hypothesis in such a way as we need lower OCDS for the new medicine i.e by using right tailed test problem can be resolved

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