Answered: The following data are from a study on…

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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(OPHTHALMOLOGY) The following data are from a study on Botox injections. Patients received a high-dose injection in one eye (experimental treatment = treatment E) and a low-dose injection in the other eye (control treatment = treatment C). Patients were asked to rate the level of pain in each eye on a 1–10 scale, with higher scores indicating more pain. The assignment of treatments to eyes was randomized. The subjects came back over several visits. Data from the last visit are given in the following table:

1. Which of the following is the correct test to conduct given the situation above?

2. The hypotheses are:

3. What is the level of significance?

4. What is the computed test statistic? Hint: Use (mean of "Pain in E eye") minus (mean of "Pain in C eye")

5. What is the correct decision based on the p-value or critical value method?

Effect of Botox injection on eye pain
Pain score at the last visit
Subject
Pain in E eye
Pain in C eye
1
1.3
8.8
2
7.3
1.3
3
0.8
4
9.5
7.8
9.0
7
3.5
5.0
8
2.3
2.5
10
2.0
8.0
11
4.5
12
3.0
4.5
13
5.0
9.0
14
0.3
7.5
15
0.5
16
0.8
4.3
Perform the appropriate t-test and identify whether there is a significant difference
between the means of the two data sets.

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