Instruction 10-14 A Quality Control Engineer Is in Charge of the Manufacture

question 128

True/False

Instruction 10-14
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", perform the appropriate test at a level of significance of 0.01.
-Referring to Instruction 10-14,the null hypothesis should be rejected.

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Definitions:

Control Chart

A graphical tool used in process control to monitor how a process changes over time, identifying trends or deviations.

Attributes

Characteristics or properties of an object, person, or event.

Qualitative Data

Data that describes qualities or characteristics, often categorized by labels or names and not by numbers.

Standard Deviation

A statistic that measures the dispersion or variability of a set of data points from their mean.