TABLE 9-6 The Quality Control Engineer for a Furniture Manufacturer Is Interested

question 146

True/False

TABLE 9-6
The quality control engineer for a furniture manufacturer is interested in the mean amount of force necessary to produce cracks in stressed oak furniture. She performs a two-tail test of the null hypothesis that the mean for the stressed oak furniture is 650. The calculated value of the Z test statistic is a positive number that leads to a p-value of 0.080 for the test.
-Referring to Table 9-6, suppose the engineer had decided that the alternative hypothesis to test was that the mean was greater than 650. Then if the test is performed with a level of significance of 0.05, the null hypothesis would be rejected.

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Definitions:

Standard Error

The standard deviation of the sampling distribution of a statistic, commonly the mean, which quantifies the precision with which a sample represents a population.

Confidence Interval Estimate

Rephrased and new definition: A statistical technique that calculates the range within which an unknown population parameter lies, based on sample data, with a specified level of confidence.

Gadd Severity Index

A scoring system used to assess the severity of an individual's criminal history or offenses.

True Population Proportion

The actual fraction or percentage of a specific characteristic within an entire population.