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 same decision would be made if this had been a two-tailed test at a level of significance of 0.01.

Question

Quizplus · Accepted Answer

The decision made in a one-tailed test may not necessarily be the same as that in a two-tailed test. For a two-tailed test at a level of significance of 0.01, the rejection region would be split between the lower and upper tails, each with a significance level of 0.005. Therefore, the critical values would differ from those in a one-tailed test and may result in a different decision.

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