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True or False: The following is the correct R code for testing a nondirectional alternative hypothesis using a = 0.01 for the hypothesis test indicated in the scenario of problem 20. R Code: t.test(after, before, paired=TRUE) O True O False

True or False: The following is the correct R code for testing a nondirectional alternative hypothesis using a = 0.01 for the hypothesis test indicated in the scenario of problem 20. R Code: t.test(after, before, paired=TRUE) O True O False

MATLAB: An Introduction with Applications
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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**True or False:** The following is the correct R code for testing a nondirectional alternative hypothesis using α = 0.01 for the hypothesis test indicated in the scenario of problem 20. **R Code:** `t.test(after, before, paired=TRUE)` - ○ True - ○ False *Explanation:* This question is assessing the understanding of using R code for conducting a paired t-test with a nondirectional (two-tailed) hypothesis at a significance level of 0.01. The code provided appears to correctly specify a paired t-test, which compares two related groups. However, the question does not specify whether additional parameters such as `alternative` or `conf.level` are needed in the code for full accuracy regarding the alternative hypothesis and significance level.
Transcribed Image Text:**True or False:** The following is the correct R code for testing a nondirectional alternative hypothesis using α = 0.01 for the hypothesis test indicated in the scenario of problem 20. **R Code:** `t.test(after, before, paired=TRUE)` - ○ True - ○ False *Explanation:* This question is assessing the understanding of using R code for conducting a paired t-test with a nondirectional (two-tailed) hypothesis at a significance level of 0.01. The code provided appears to correctly specify a paired t-test, which compares two related groups. However, the question does not specify whether additional parameters such as `alternative` or `conf.level` are needed in the code for full accuracy regarding the alternative hypothesis and significance level.
Xarelto is a drug that can be used as a blood thinner for patients who have a pulmonary embolism or other blood clotting condition. Researchers wanted to determine if there was a difference in blood viscosity (measured in mPA · S) that might be attributed to the drug. In a study, a random sample of 7 patients who had a family history of blood clotting disorders were treated with Xarelto for two months. Their blood viscosity was measured before and after the treatment. The data are shown in the table below: | Patient | Before | After | Difference = After - Before | |---------|--------|-------|-----------------------------| | 1 | 6.7 | 4.3 | -2.4 | | 2 | 7.1 | 4.6 | -2.5 | | 3 | 5.6 | 6.7 | 1.1 | | 4 | 6.9 | 4.4 | -2.5 | | 5 | 7.5 | 6.0 | -1.5 | | 6 | 6.8 | 4.9 | -1.9 | | 7 | 5.7 | 5.8 | 0.1 | The table includes additional statistical measurements for the 'Before' and 'After' columns: - \( \bar{y} \) (mean): 6.61 (Before), 5.24 (After), Difference = -1.37 - \( s \) (standard deviation): 0.71 (Before), 0.92 (After), Difference = 1.42
Transcribed Image Text:Xarelto is a drug that can be used as a blood thinner for patients who have a pulmonary embolism or other blood clotting condition. Researchers wanted to determine if there was a difference in blood viscosity (measured in mPA · S) that might be attributed to the drug. In a study, a random sample of 7 patients who had a family history of blood clotting disorders were treated with Xarelto for two months. Their blood viscosity was measured before and after the treatment. The data are shown in the table below: | Patient | Before | After | Difference = After - Before | |---------|--------|-------|-----------------------------| | 1 | 6.7 | 4.3 | -2.4 | | 2 | 7.1 | 4.6 | -2.5 | | 3 | 5.6 | 6.7 | 1.1 | | 4 | 6.9 | 4.4 | -2.5 | | 5 | 7.5 | 6.0 | -1.5 | | 6 | 6.8 | 4.9 | -1.9 | | 7 | 5.7 | 5.8 | 0.1 | The table includes additional statistical measurements for the 'Before' and 'After' columns: - \( \bar{y} \) (mean): 6.61 (Before), 5.24 (After), Difference = -1.37 - \( s \) (standard deviation): 0.71 (Before), 0.92 (After), Difference = 1.42
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Given that, Xarelto is a drug that can be used as a blood thinner for patients who have a pulmonary embolism or other blood clotting condition. Researchers wanted to determine if there was a difference in blood viscosity (measured in mPAS) that might be attributed to the drug. In a study, a random sample of 7 patients who had a family history  of blood clotting disorders were treated with Xarelto for two months. Their blood viscosity was measured before and after the treatment.

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