TABLE 10-10 A Corporation Randomly Selects 150 Salespeople and Finds That 66

question 166

Multiple Choice

TABLE 10-10
A corporation randomly selects 150 salespeople and finds that 66% who have never taken a self-improvement course would like such a course. The firm did a similar study 10 years ago in which 60% of a random sample of 160 salespeople wanted a self-improvement course. The groups are assumed to be independent random samples. Let π₁ and π₂ represent the true proportion of workers who would like to attend a self-improvement course in the recent study and the past study, respectively.
-Referring to Table 10-10, the company tests to determine at the 0.05 level whether the population proportion has changed from the previous study. Which of the following is correct?

• A) Reject the null hypothesis and conclude that the proportion of employees who are interested in a self-improvement course has changed over the intervening 10 years.
• B) Do not reject the null hypothesis and conclude that the proportion of employees who are interested in a self-improvement course has not changed over the intervening 10 years.
• C) Reject the null hypothesis and conclude that the proportion of employees who are interested in a self-improvement course has increased over the intervening 10 years.
• D) Do not reject the null hypothesis and conclude that the proportion of employees who are interested in a self-improvement course has increased over the intervening 10 years.

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Definitions:

Morphemes

Morphemes are the smallest grammatical units in a language that carry meaning, including prefixes, roots, and suffixes.

Semantics

The branch of linguistics concerned with the meaning of words, phrases, and sentences, and how meaning is constructed and understood.

Underextensions

A linguistic phenomenon observed in language development where a child applies a word too narrowly, limiting its use to a single object rather than to all objects of the same category.

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