viruses typically cause common colds. In a test of the effectiveness of echinacea, 31 of the 38 subjects treated with echinacea developed rhinovirus infections. In a placebo group,83 of the 97 subjects developed rhinovirus infections. Use a 0.01 significance level to test the claim that echinacea has an effect on rhinovirus infections. a. Identify the test statistic. z equals (Round to two decimal places as needed.) b. Identify the P-value. P-value equals (Round to three decimal places as needed.) c. Test the claim by constructing an appropriate confidence interval
viruses typically cause common colds. In a test of the effectiveness of echinacea, 31 of the 38 subjects treated with echinacea developed rhinovirus infections. In a placebo group,83 of the 97 subjects developed rhinovirus infections. Use a 0.01 significance level to test the claim that echinacea has an effect on rhinovirus infections. a. Identify the test statistic. z equals (Round to two decimal places as needed.) b. Identify the P-value. P-value equals (Round to three decimal places as needed.) c. Test the claim by constructing an appropriate confidence interval
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Rhino viruses typically cause common colds. In a test of the effectiveness of echinacea, 31 of the 38 subjects treated with echinacea developed rhinovirus infections. In a placebo group,83 of the 97 subjects developed rhinovirus infections. Use a 0.01 significance level to test the claim that echinacea has an effect on rhinovirus infections.
a. Identify the test statistic. z equals
(Round to two decimal places as needed.)
b. Identify the P-value. P-value equals
(Round to three decimal places as needed.)
c. Test the claim by constructing an appropriate confidence interval.
The 95% confidence interval is
less thanleft parenthesis p 1 minus p 2 right parenthesisless than
(Round to three decimal places as needed.)
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