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Chapter 1: Q 1.13. (page 8)

Thoughts on Evolution. In an article titled "Who has designs on your student's minds?" (Nature, Vol. 434, pp. 1062-1065), author G. Brumfiel postulated that support for Darwinism increases with level of education. The following table provides percentages of U.S. adults, by educational level, who believe that evolution is a scientific theory well supported by evidence.

(a) Do you think that this study is descriptive or inferential? Explain your answer.

(b) If, in fact, the study is inferential, identify the sample and population.

Short Answer

Expert verified

Part (a) Inferential

Part (b) Sample:- educated individuals who were interviewed for the statistics.

Population:- U.S. Adults about whom the conclusion is being drawn.

Step by step solution

01

Part (a) Step 1. Given information.

The given statement is:

The following table provides percentages of U.S. adults, by educational level, who believe that evolution is a scientific theory well supported by evidence:

02

Part (a) Step 2. Classify the given study as either descriptive or inferential.

The given study is inferential in nature because it tries to reach a reliable conclusion about Geoff Brumfield's postulate.

03

Part (b) Step 1. Identify the sample and population.

The educated people who were interviewed for statistics make up the sample.

Adults in the United States make up the population for which a conclusion is formed.

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Most popular questions from this chapter

In Exercises 1.7-1.12, classify each of the studies as either descriptive or inferential. Explain your answers.

In-Demand College Majors. In a June 2013 article, published online by The Street, B. O'Connell discussed the results of a survey on opportunities for graduating college students. In one aspect of the survey, the following percentage estimates were reported on which college majors were in demand among U.S. firms. [SOURCE: "The Most In-Demand College Majors This Year." Published by Career-Builder, LLC, 2013.]

Ideally, in stratified sampling, the members of each stratum should be relative to the characteristic under consideration.

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Identify two methods for obtaining a simple random sample.
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