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

question 61

True/False

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 indicates that the machine is not working properly.

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Definitions:

Probability

A measure of the likelihood that an event will occur.

Research Hypothesis

A statement made by a researcher predicting a possible outcome or association between two or more variables in a study, often tested against the null hypothesis.

Binge Drinking

The consumption of an excessive amount of alcohol in a short period, typically defined as five or more drinks for men and four or more for women within about two hours.

Statistical Probability

The likelihood or chance of an event occurring, based on a scale from 0 to 1, where 0 indicates impossibility and 1 indicates certainty.