TABLE 2-1 The Manager of the Customer Service Division of a Major

question 258

Multiple Choice

TABLE 2-1
The manager of the customer service division of a major consumer electronics company is interested in determining whether the customers who have purchased a DVD player made by the company over the past 12 months are satisfied with their products.
-Referring to Table 2-1, the possible responses to the question "What is your annual income rounded to the nearest thousands?" are values from a

• A) discrete numerical random variable.
• B) continuous numerical random variable.
• C) categorical random variable.
• D) parameter.

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Definitions:

Standard Deviation

The measure of the dispersion of a set of values relative to its mean, indicating how spread out the values are.

Standard Normal Curve

A bell-shaped curve that is symmetric about the mean, representing the distribution of a standard normal variable with a mean of zero and a variance of one.

Mean

The arithmetic average of a set of numbers, calculated by dividing the sum of all values by the count of the values.

Frequency Curve

A graphical representation depicting the distribution of different frequencies of a set of data.