A Quality Control Engineer Is in Charge of the Manufacture

question 79

Multiple Choice

A quality control engineer is in charge of the manufacture of computer disks. Two different processes can be used to manufacture the disks. He suspects that the Kohler method produces a greater proportion of defects than the Russell method. He samples 150 of the Kohler and 200 of the Russell disks and finds that 27 and 18 of them, respectively, are defective. If Kohler is designated as "Group 1" and Russell is designated as "Group 2," which of the following tests will you use to find out if the Kohler method is worse than the Russell method?

• A) paired t test
• B) Friedman rank test
• C) Z test for difference in proportions
• D) ç² test for difference in proportions

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Definitions:

Job M598

A specific task or project identified by code M598 within a job costing system, where costs are tracked individually.

Markup

The extra charge added onto the purchase price of products to account for operational costs and generate profit.

Predetermined Overhead Rate

A rate calculated before the period begins, used to allocate manufacturing overhead to products based on a specific activity base.

Fixed Manufacturing Overhead

The static costs associated with manufacturing a product, which do not change with the volume of production, such as rent and salaries.