7.9 PRACTICE PROBLEMS 1. Data are collected in a clinical trial evaluating a ne compound designed to improve wound healing trauma patients. The new compound is compare against a placebo. After treatment for 5 days with th new compound or placebo, the extent of wound hea ing is measured and the data are shown in Table 7- Is there a difference in the extent of wound healing TABLE 7-6 Data for Practice Problems 1 and 2 Treatment New compound (n = 125) Placebo (n = 125) Percent Wound Healing 0-25% 26-50% 51-75% 15 36 37 45 32 34 76-100% 41 10
7.9 PRACTICE PROBLEMS 1. Data are collected in a clinical trial evaluating a ne compound designed to improve wound healing trauma patients. The new compound is compare against a placebo. After treatment for 5 days with th new compound or placebo, the extent of wound hea ing is measured and the data are shown in Table 7- Is there a difference in the extent of wound healing TABLE 7-6 Data for Practice Problems 1 and 2 Treatment New compound (n = 125) Placebo (n = 125) Percent Wound Healing 0-25% 26-50% 51-75% 15 36 37 45 32 34 76-100% 41 10
MATLAB: An Introduction with Applications
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ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
Section: Chapter Questions
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Transcribed Image Text:7.9 PRACTICE PROBLEMS
1. Data are collected in a clinical trial evaluating a new
compound designed to improve wound healing in
trauma patients. The new compound is compared
against a placebo. After treatment for 5 days with the
new compound or placebo, the extent of wound heal-
ing is measured and the data are shown in Table 7-6.
Is there a difference in the extent of wound healing by
TABLE 7-6 Data for Practice Problems 1 and 2
Treatment
New compound
(n = 125)
Placebo
(n = 125)
0-25%
15
36
Percent Wound Healing
26-50% 51-75% 76-100%
37
45
32
34
41
10
treatment? (Hint: Are treatment and the percent
wound healing independent?) Run the appropriate
test at a 5% level of significance.
2. Use the data in Problem 1 and pool the data across the
treatments into one sample of size n = 250. Use the
pooled data to test whether the distribution of the
percent wound healing is approximately normal.
Specifically, use the following distribution: 30%, 40%,
20%, and 10%. Run the appropriate test at a = 0.05. |
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