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TABLE 11-5
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 four procedures, and collects the following numbers of patients from their own records:
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.
-Referring to Table 11-5, the decision made suggests that the four procedures do not all have the same proportion of clear operations.
Smallpox
A contagious, disfiguring, and often deadly disease that has been eradicated globally thanks to vaccination.
Prenatal Development
The process by which a baby develops inside the mother's womb or uterus, spanning from conception to birth.
Embryonic Stage
A critical phase in prenatal development that occurs from the end of the second week to the end of the eighth week after fertilization, during which the major organs and structures of the organism begin to develop.
Foetal Stage
The stage of human development inside the womb from the end of the embryonic stage to birth.
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