Four surgical procedures currently are used to install pacemakers. If the patient does not need to return for follow-up surgery, the operation is called a "clear" operation. A heart center wants to compare the proportion of clear operations for the 4 procedures. They will use this information to test for a difference among the proportion of clear operations using a chi-square test with a level of significance of 0.05. A B C D Clear 27 41 21 7 Return 11 15 9 11 Total 38 56 30 18 State the null hypothesis: State the alternative hypothesis The p value is What is your conclusion?
Four surgical procedures currently are used to install pacemakers. If the patient does not need to return for follow-up surgery, the operation is called a "clear" operation. A heart center wants to compare the proportion of clear operations for the 4 procedures. They will use this information to test for a difference among the proportion of clear operations using a chi-square test with a level of significance of 0.05. A B C D Clear 27 41 21 7 Return 11 15 9 11 Total 38 56 30 18 State the null hypothesis: State the alternative hypothesis The p value is What is your conclusion?
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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Four surgical procedures currently are used to install pacemakers. If the patient does not need to
return for follow-up surgery, the operation is called a "clear" operation. A heart center wants to
compare the proportion of clear operations for the 4 procedures. They will use this information to test for a difference among the proportion of clear operations using a chi-square test with a level of significance of 0.05.
| A | B | C | D | ||
| Clear | 27 | 41 | 21 | 7 | |
| Return | 11 | 15 | 9 | 11 | |
| Total | 38 | 56 | 30 | 18 | |
- State the null hypothesis:
- State the alternative hypothesis
- The p value is
- What is your conclusion?
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