Four surgical procedures are used to install pacemakers. If the patient does not need to return for follow-up surgery, the operation is considereda “clear” operation. In an aim to compare the proportion of clear operations for the four procedures (using a chi-square test), the heart center collects the below patient information from their own records. Procedure A B C D Total Clear 27 41 21 7 96 Return 11 15 9 11 46 Total 38 56 30 18 142 The expected frequency for the Procedure B/Clear cell is , and the expected frequency for the Procedure C/Return cell is . 12.31 and 12.17 37.86 and 9.72 27.00 and 11.00 28.31 and 7.03

Four surgical procedures are used to install pacemakers. If the patient does not need to return for follow-up surgery, the operation is considereda “clear” operation. In an aim to compare the proportion of clear operations for the four procedures (using a chi-square test), the heart center collects the below patient information from their own records. Procedure A B C D Total Clear 27 41 21 7 96 Return 11 15 9 11 46 Total 38 56 30 18 142 The expected frequency for the Procedure B/Clear cell is , and the expected frequency for the Procedure C/Return cell is . 12.31 and 12.17 37.86 and 9.72 27.00 and 11.00 28.31 and 7.03

College Algebra (MindTap Course List)

12th Edition

ISBN:9781305652231

Author:R. David Gustafson, Jeff Hughes

Publisher:R. David Gustafson, Jeff Hughes

Chapter8: Sequences, Series, And Probability

Section8.7: Probability

Problem 5E: List the sample space of each experiment. Rolling one die and tossing one coin

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	Procedure
	A	B	C	D	Total
Clear	27	41	21	7	96
Return	11	15	9	11	46
Total	38	56	30	18	142