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?

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section: Chapter Questions

Problem 8CR

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