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Researchers want to determine the effectiveness of heavy doses of vitamin C on colds. A random...

Researchers want to determine the effectiveness of heavy doses of vitamin C on colds. A random sample of 407

individuals took heavy doses of vitamin C and a random sample of 411 individuals took placebos. In the group

who took vitamins, 105 of the participants had no colds throughout the study. In the placebo group, 76 of the

participants had no colds throughout the study. At a 5% significance level, test to see if there is good evidence

that the proportion of individuals who have no colds is higher for those taking heavy doses of vitamin C than

those taking a placebo.

Math   Statistics-And-Probability   
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