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 ABCDTotalClear274121796Return111591146Total38563018142 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

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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 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

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