TABLE 10-12 A Quality Control Engineer Is in Charge of the Manufacture

question 208

True/False

TABLE 10-12
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 Table 10-12, the same decision would be made if this had been a two-tail test at a level of significance of 0.01.

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Definitions:

Seasonal Drought

A period of below-average precipitation in a given region, resulting in prolonged shortages of water supply, often depending on the season.

Monsoon

Wind that reverses direction seasonally.

Chaparral

Biome of dry shrubland in regions with hot, dry summers and cool, rainy winters.

Fire-resistant

Materials or substances that are able to withstand fire or to resist burning.