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Rhino viruses typically cause common colds. In a test of the effectiveness of​ echinacea, 40 of...

Rhino viruses typically cause common colds. In a test of the effectiveness of​ echinacea, 40 of the 45 subjects treated with echinacea developed rhinovirus infections. In a placebo​ group, 82

of the 98 subjects developed rhinovirus infections. Use a 0.01 significance level to test the claim that echinacea has an effect on rhinovirus infections. Complete parts​ (a) through​ (c) below.

a) find test statistic

b) find the p-value

c) construct a confidence interval

Math   Statistics-And-Probability   
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