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In Exercise, test the given claim.Clinical Trial of

Elementary Statistics | 12th Edition | ISBN: 9780321836960 | Authors: Mario F. Triola ISBN: 9780321836960 18

Solution for problem 15BSC Chapter 11.3

Elementary Statistics | 12th Edition

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Elementary Statistics | 12th Edition | ISBN: 9780321836960 | Authors: Mario F. Triola

Elementary Statistics | 12th Edition

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Problem 15BSC

Problem  15BSC

In Exercise, test the given claim.

Clinical Trial of Echinacea In a clinical trial of the effectiveness of echinacea for preventing colds, the results in the table below were obtained (based on data from “An Evaluation of Echinacea Angustifolia in Experimental Rhinovirus Infections,” by Turner et al., New England Journal of Medicine, Vol. 353, No. 4). Use a 0.05 significance level to test the claim that getting a cold is independent of the treatment group. What do the results suggest about the effectiveness of echinacea as a prevention against colds?

 

Treatment Group

 

Placebo

Echinacea: 20% extract

Echinacea: 60% extract

Got a Cold

88

48

42

Did Not Get a Cold

15

4

10

Step-by-Step Solution:

Answer:

Step 1 of 2</p>

 

Treatment Group

 

Placebo

Echinacea: 20% extract

Echinacea: 60% extract

Total

Got a Cold

88

48

42

178

Did Not Get a Cold

15

4

10

29

Total

103

52

52

207

The solution to this problem takes four steps: (1) state the hypotheses, (2) formulate an analysis plan, (3) analyze sample data, and (4) interpret results. We work through those steps below:

State the hypotheses. The first step is to state the null hypothesis and an alternative hypothesis.

H0: The claim that the amount of smoking is independent of seat belt use

H1: The claim that the amount of smoking is not independent of seat belt use

Formulate an analysis plan. For this analysis, the significance level is 0.05. Using sample data, we will conduct a chi-square test for independence.

Applying the chi-square test for independence to sample data, we compute the degrees of freedom, the expected frequency counts, and the chi-square test statistic.

DF = (r - 1)  (c - 1) = (2 - 1)  (3 - 1) = 2

...

 

Treatment Group

 

Placebo

Echinacea: 20% extract

Echinacea: 60% extract

Total

Got a Cold

88

48

42

178

Did Not Get a Cold

15

Step 2 of 3

Chapter 11.3, Problem 15BSC is Solved
Step 3 of 3

Textbook: Elementary Statistics
Edition: 12
Author: Mario F. Triola
ISBN: 9780321836960

This textbook survival guide was created for the textbook: Elementary Statistics, edition: 12. Elementary Statistics was written by and is associated to the ISBN: 9780321836960. The full step-by-step solution to problem: 15BSC from chapter: 11.3 was answered by , our top Statistics solution expert on 03/15/17, 10:30PM. This full solution covers the following key subjects: echinacea, claim, treatment, results, RAC. This expansive textbook survival guide covers 121 chapters, and 3629 solutions. The answer to “In Exercise, test the given claim.Clinical Trial of Echinacea In a clinical trial of the effectiveness of echinacea for preventing colds, the results in the table below were obtained (based on data from “An Evaluation of Echinacea Angustifolia in Experimental Rhinovirus Infections,” by Turner et al., New England Journal of Medicine, Vol. 353, No. 4). Use a 0.05 significance level to test the claim that getting a cold is independent of the treatment group. What do the results suggest about the effectiveness of echinacea as a prevention against colds? Treatment Group PlaceboEchinacea: 20% extractEchinacea: 60% extractGot a Cold884842Did Not Get a Cold15410” is broken down into a number of easy to follow steps, and 102 words. Since the solution to 15BSC from 11.3 chapter was answered, more than 432 students have viewed the full step-by-step answer.

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