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TABLE 12-5
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 4 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 12-5, there is sufficient evidence to conclude that the proportions between procedure A and procedure D are different at a 0.05 level of significance.
Standard Deviation
A statistical measure that quantifies the amount of variability or dispersion of a set of data points.
Capacity
The maximum amount of work that a system, facility, or workforce can produce or handle over a given period.
Expected Profit
The predicted amount of profit calculated by estimating revenues and subtracting estimated costs and expenses.
Landfill
A site for the disposal of waste materials by burying them, and is the oldest form of waste treatment.
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