c. Based on the results, 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 lowers the infection rate.O B. Echinacea does not appear to have a significant effect on the infection rate.O C. Echinacea does appear to have a significant effect on the infection rate. There is evidence that it increases the infection rate.O D. The results are inconclusive.Click to select your answer(s). Rhino viruses typically cause common colds. In a test of the effectiveness of echinacea, 37 of the 42 subjects treated with echinacea developed rhinovirus infections. In a placebo group, 84 of the 101 subjects developed rhinovirusa 0.05 significance level to test the claim that echinacea has an effect on rhinovirus infections. Complete parts (a) through (c) below.a. Test the claim using a hypothesis test.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 are the null and alternative hypotheses for the hypothesis test?O C. Ho: P1 = P2H,: P1 # P2B. Ho: P1 2 P2O A. Ho: P1 #P2H:P, = P2H4: P1 # P2O D. Ho: P1 = P2H1:P1 P2Identify the test statistic.(Round to two decimal places as needed.)Identify the P-value.P-value =(Round to three decimal places as needed.)What is the conclusion based on the hypothesis test?the significance level of a = 0.05, sothe null hypothesis. Theresufficient evidence to support the claim that echinacea treatment has an effect.The P-value is%3Db. Test the claim by constructing an appropriate confidence interval.The 95% confidence interval is <(p, - P2)

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Description: c. Based on the results, 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 lowers the infection rate.O B. Echinacea does not appear

Sample proportion of subjects treated with echinacea: p1=3742 =0.880952381 Sample proportion of…

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c. Based on the results, 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 lowers the infection rate. OB. Echinacea does not appear to have a significant effect on the infection rate. C. Echinacea does appear to have a significant effect on the infection rate. There is evidence that it increases the infection rate. O D. The results are inconclusive. Click to select your answer(s).

c. Based on the results, 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 lowers the infection rate. OB. Echinacea does not appear to have a significant effect on the infection rate. C. Echinacea does appear to have a significant effect on the infection rate. There is evidence that it increases the infection rate. O D. The results are inconclusive. Click to select your answer(s).

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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Concept explainers

Types of Bias

Statistics is the study of data collection, organization, analysis, interpretation, and presentation. Statistical bias is a characteristic of a statistical technique or its findings in which the expected value deviates from the actual root quantitative parameter being estimated. According to the actual definition of bias, it refers to the tendency of a statistic to overestimate or underestimate a parameter.

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Question

c. Based on the results, 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 lowers the infection rate.
O B. Echinacea does not appear to have a significant effect on the infection rate.
O C. Echinacea does appear to have a significant effect on the infection rate. There is evidence that it increases the infection rate.
O D. The results are inconclusive.
Click to select your answer(s).

Rhino viruses typically cause common colds. In a test of the effectiveness of echinacea, 37 of the 42 subjects treated with echinacea developed rhinovirus infections. In a placebo group, 84 of the 101 subjects developed rhinovirus
a 0.05 significance level to test the claim that echinacea has an effect on rhinovirus infections. Complete parts (a) through (c) below.
a. Test the claim using a hypothesis test.
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 are the null and alternative hypotheses for the hypothesis test?
O C. Ho: P1 = P2
H,: P1 # P2
B. Ho: P1 2 P2
O A. Ho: P1 #P2
H:P, = P2
H4: P1 # P2
O D. Ho: P1 = P2
H1:P1 <P2
O E. Ho: P1 Sp2
H: P, #P2
O F. Ho: P1 = P2
H: P1 > P2
Identify the test statistic.
(Round to two decimal places as needed.)
Identify the P-value.
P-value =
(Round to three decimal places as needed.)
What is the conclusion based on the hypothesis test?
the significance level of a = 0.05, so
the null hypothesis. There
sufficient evidence to support the claim that echinacea treatment has an effect.
The P-value is
%3D
b. Test the claim by constructing an appropriate confidence interval.
The 95% confidence interval is <
(p, - P2) <U-
(Round to three decimal places as needed.)
What is the conclusion based on the confidence interval?
Click to select your answer(s).

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