Instruction 15-6
Four Surgical Procedures Currently Are Used to Install

question 85

Short Answer

Instruction 15-6
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 centre wants to compare the proportion of clear operations for the four procedures, and collects the following numbers of patients from their own records:
| Procedure |
$$\begin{array} { | l | c | c | c | c | c | } \hline & \text { A } & \text { B } & \text { C } & \text { D } & \text { Total } \\\hline \text { Clear } & 27 & 41 & 21 & 7 & 96 \\\hline \text { Return } & 11 & 15 & 9 & 11 & 46 \\\hline \text { Total } & 38 & 56 & 30 & 18 & 142 \\\hline\end{array}$$ They will use this information to test for a difference among the proportion of clear operations using a chi-square test with a 0.05 level of significance.
-Referring to Instruction 15-6,the expected cell frequency for the Procedure A/Clear cell is_______.

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Definitions:

Accounts Receivable

Signifies the amount of money that customers owe to a business for products or services that have been provided but remain unpaid.

Editing Fees

Charges or costs associated with the professional editing of written material, including books, articles, and reports.

Shift of Assets

Shift of assets involves reallocating or transferring assets from one investment to another or from one asset class to another.

Accounts Receivable

Money owed to a business by its customers for goods or services sold on credit.