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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 ________.
Two-sample T Procedure
The two-sample T procedure is a statistical method used to compare the means of two independent samples to determine if there is a significant difference between them.
Sample Size
The number of observations or data points that are included in a statistical sample.
Two Sample T Procedures
Statistical tests that compare the means of two independent samples to determine if there is a statistically significant difference between them.
Subjects
Individuals or entities that are the focus of a research study, often used in experiments to collect data.
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