TABLE 17-3 A Quality Control Analyst for a Light Bulb Manufacturer Is

question 77

Multiple Choice

TABLE 17-3
A quality control analyst for a light bulb manufacturer is concerned that the time it takes to produce a batch of light bulbs is too erratic.Accordingly,the analyst randomly surveys 10 production periods each day for 14 days and records the sample mean and range for each day.

-Referring to Table 17-3,suppose the analyst constructs an chart to see if the production process is in-control.Which expression best describes this chart?

• A)In-control
• B)Increasing trend
• C)Decreasing trend
• D)Individual outliers

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Definitions:

Ordered Array

An ordered array is a collection of elements arranged in a specified manner, often in ascending or descending order, facilitating easier search and analysis of the data.

Pooled Sample Data

Combined data from two or more samples, often used in statistical analyses to gain more precise estimates of population parameters.

Wilcoxon Test Statistic

A non-parametric test statistic used to compare two paired groups, assessing whether their population mean ranks differ.

Two-Tail

Refers to a type of hypothesis test that considers both directions of difference or effect, looking for deviations in two opposite directions.