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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 46 subjects treated with echinacea developed rhinovirus infections. In a placebo​ group,

91 of the 108 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.

identify the test statistic Z=

find the P-value=

Math   Statistics-And-Probability   
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