SCENARIO 1-1 The Manager of the Customer Service Division of a Major

question 147

Multiple Choice

SCENARIO 1-1
The manager of the customer service division of a major consumer electronics company is interested
in determining whether the customers who have purchased a Blu-ray player made by the company
over the past 12 months are satisfied with their products.
-Referring to Scenario 1-1, the possible responses to the question "How many people are there in
Your household?" result in

• A) a nominal scale variable.
• B) an ordinal scale variable.
• C) an interval scale variable.
• D) a ratio scale variable.

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Definitions:

Sample Mean

The average value of a sample subset of a population, often used as an estimate of the population mean.

Pooled Standard Deviation

A method of estimating the standard deviation across two or more sample sets by pooling their variances under the assumption that the population variances are equal.

Sample Means

The average values derived from multiple sample sets drawn from a population, important in understanding the population's overall mean.

Control Limits

The boundaries in control charts that indicate the limits of expected variations in a stable process.