TABLE 8-2 A Quality Control Engineer Is Interested in the Mean Length

question 149

Short Answer

TABLE 8-2
A quality control engineer is interested in the mean length of sheet insulation being cut automatically by machine. The desired mean length of the insulation is 12 feet. It is known that the standard deviation in the cutting length is 0.15 feet. A sample of 70 cut sheets yields a mean length of 12.14 feet. This sample will be used to obtain a 99% confidence interval for the mean length cut by machine.
-Referring to Table 8-2, the confidence interval goes from ________ to ________.

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Definitions:

Standardization

Entails the process of implementing and developing technical standards to optimize compatibility, safety, repeatability, or quality.

Delegate

To assign responsibility or authority from one person to another, often from a superior to a subordinate.

Routine Tasks

Predictable and repetitive activities that are essential to daily operations but require minimal decision-making.

Discretion

The quality of behaving or speaking in such a way as to avoid causing offense or revealing private information; the ability to make responsible decisions.