Researchers investigated the effectiveness of oral zinc, as compared to a placeb

Question

Researchers investigated the effectiveness of oral zinc, as compared to a placebo, in reducing the duration of the common cold when taken within 24 hours of the onset of symptoms. The researchers found those taking oral zinc had a statistically significantly shorter duration (P<0.05) than those taking the placebo.

This means that

A- the value of the test statistic, the mean reduction in duration of the cold, is large.

B- neither of the options are correct.

C- the probability that the alternative hypothesis is true is less than 0.05 .

D- the probability that the null hypothesis is true is less than 0.05 .

Explanation / Answer

here as p value represent probability of getting the sample test statsitic or more extreme if null hypothesis is true

theefore option D is correct

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