Rhino viruses typically cause common colds. In a test of the effectiveness of echinacea, 65 of rhe 76 subjects treared with echinacea developed rhinovirus infections. In a placebo group, 82 of the 106 subjects developed rhinovirus infections. Using a 0.05
TawniRodrigueza) Determine the critical value.
b) Determine the test statistic.
c) Decide whether or not we reject or fail to reject the null hypothesis.
d) State whether or not there was sufficient evidence to support the claim.
e) Construct the confidence interval about the difference between the two proportions.
Write the confidence interval as (LowerValue, HigherValue)
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