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

question 160

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 critical value to use in obtaining the confidence interval is ________.

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Definitions:

Prime

In a mathematical context, a prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself.

Further Processing

The additional analysis, treatment, or refinement that materials, information, or ideas undergo after initial handling.

Stimulus

Anything that can elicit a physiological or psychological response or reaction in an organism.

Gain-framed Appeal

Persuasive communication emphasizing the positive benefits or outcomes of adopting a certain behavior or stance.