SCENARIO 10-12
A quality control engineer is in charge of the manufacture of USB flash drives.Two different processes can be used to manufacture the flash drives.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 flash drives 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 Scenario 10-12,the same decision would be made with this test if the level of significance had been 0.05 rather than 0.01.

Question

Quizplus · Accepted Answer

The decision of a hypothesis test regarding the proportion of defects between two groups is based on the p-value and the level of significance. If a decision is made at a 0.01 level of significance, it implies that the evidence against the null hypothesis was strong. If the level of significance were less stringent, such as 0.05, the decision to reject or not reject the null hypothesis would remain the same, because a p-value that is significant at a lower level (0.01) would also be significant at a higher level (0.05).

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