Which of the following can be used by the researcher to decrease the width of the confidence interval? (Select all that apply.) A. Increase the confidence level OB. Decrease the confidence level C. Increase the sample size OD. Decrease the sample size
Which of the following can be used by the researcher to decrease the width of the confidence interval? (Select all that apply.) A. Increase the confidence level OB. Decrease the confidence level C. Increase the sample size OD. Decrease the sample size
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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first picture is the background information
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 the table below:
Blood Viscocity (mPA. S)
Patient
1
2
3
4
5
6
7
y
S
Before
6.7
7.1
5.6
6.9
7.5
6.8
5.7
6.61
0.71
After
4.3
4.6
6.7
4.4
6.0
4.9
5.8
5.24
0.92
Difference After
- Before
-2.4
-2.5
1.1
-2.5
-1.5
-1.9
-0.1
-1.37
1.42
Transcribed Image Text:Which of the following can be used by the researcher to decrease the width of the confidence interval?
(Select all that apply.)
A. Increase the confidence level
OB. Decrease the confidence level
OC. Increase the sample size
OD. Decrease the sample size
Expert Solution
Step 1
We have to determine the factors that will lead to decrease the width of confidence interval.
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