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 "How many people are there in your household?" are values from a
A) discrete numerical random variable.
B) continuous numerical random variable.
C) categorical random variable.
D) parameter.

Question

Quizplus · Accepted Answer

The question "How many people are there in your household?" can only have integer values, which makes it a discrete numerical variable. The values are also random, as they depend on the particular household being surveyed, which makes it a random variable. Therefore, the best choice is option A. Option B is incorrect because the variable is not continuous. Option C is incorrect because the responses are not categories, but numerical values. Option D is incorrect because a parameter is a numerical summary measure of a population, not a type of variable.

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