Rhino viruses typically cause common colds. In a test of the effectiveness of echinacea, 44 of the 51 subjects treated with echinacea developed rhinovirus infections.In a placebo group, 87 of the 103 subjects developed rhinovirus infections. Use a 0.05 significance level to test the claim that echinacea has an effect on rhinovirusinfections as follows.Identify the test statistic.(Round to three decimal places as needed.)What is the conclusion based on the hypothesis test?V the null hypothesis. ThereV sufficient evidence to support the claim that echinacea treatment has an effect.Does echinacea appear to have any effect on the infection rate?O A. Echinacea does appear to have a significant effect on the infection rate. There is evidence that it increases the infection rate.waiOB. Echinacea does appear to have a significant effect on the infection rate. There is evidence that it lowers the infection rate.O C. Echinacea does not appear to have a significant effect on the infection rate.poulO D. The results are inconclusive.Click to select your answer(s) and then click Check Answer.Check AnswerClear AllAll parts showing Question Help ▼Rhino viruses typically cause common colds. In a test of the effectiveness of echinacea, 44 of the 51 subjects treated with echinacea developed rhinovirus infections.In a placebo group, 87 of the 103 subjects developed rhinovirus infections. Use a 0.05 significance level to test the clairm that echinacea has an effect on rhinovirusinfections as follows.Consider the first sample to be the sample of subjects treated with echinacea and the second sample to be the sample of subjects treated with a placebo. What arethe null and alternative hypotheses for the hypothesis test?O A. Ho: P1 =P2O B. Ho: P1 p2H1: P1= P2OC. Ho: P1 = P2H1: P1 P2O F. Ho: P12 P2H1: P1 P2H1: P1 P2Use the z-table to find the lower critical value.dvar(Round to three decimal places as needed.)Use the z-table to find the upper critical value.(Round to three decimal places as needed.)boutClick to select your answer(s) and then click Check Answer.All parts showingClear AllCheck Answer

Given n1=51x1=44n2=103x2=87α=0.05

Rhino viruses typically cause common colds. In a test of the effectiveness of echinacea, 44 of the 51 subjects treated with echinacea developed rhinovirus infections In a placebo group, 87 of the 103 subjects developed rhinovirus infections. Use a 0.05 significance level to test the claim that echinacea has an effect on rhinovirus infections as follows. Identify the test statistic. (Round to three decimal places as needed.) What is the conclusion based on the hypothesis test? the null hypothesis. There V sufficient evidence to support the claim that echinacea treatment has an effect. Does echinacea appear to have any effect on the infection rate? O A. Echinacea does appear to have a significant effect on the infection rate. There is evidence that it increases the infection rate. O B. Echinacea does appear to have a significant effect on the infection rate. There is evidence that it lowers the infection rate. O C. Echinacea does not appear to have a significant effect on the infection rate. ul O D. The results are inconclusive.

Rhino viruses typically cause common colds. In a test of the effectiveness of echinacea, 44 of the 51 subjects treated with echinacea developed rhinovirus infections In a placebo group, 87 of the 103 subjects developed rhinovirus infections. Use a 0.05 significance level to test the claim that echinacea has an effect on rhinovirus infections as follows. Identify the test statistic. (Round to three decimal places as needed.) What is the conclusion based on the hypothesis test? the null hypothesis. There V sufficient evidence to support the claim that echinacea treatment has an effect. Does echinacea appear to have any effect on the infection rate? O A. Echinacea does appear to have a significant effect on the infection rate. There is evidence that it increases the infection rate. O B. Echinacea does appear to have a significant effect on the infection rate. There is evidence that it lowers the infection rate. O C. Echinacea does not appear to have a significant effect on the infection rate. ul O D. The results are inconclusive.

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, 39 of the 44 subjects treated with echinacea developed rhinovirus infections. In a placebo group, 95 of the 112 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 software company is interested in improving customer satisfaction rate from the 55% currently claimed. The company sponsored a survey of 247 customers and found that 146 customers were satisfied. What is the test statistic z?
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