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Chapter 1: Q 1.12. (page 8)

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.]

Short Answer

Expert verified

The given study is inferential.

Step by step solution

01

Step 1. Given information.

The given statement is:

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.

02

Step 2. Classify the given study as either descriptive or inferential.

The given survey estimates the percentage of college majors which are in demand in U.S. firms.

The data or conclusion provided on the population of all US firms is based on a sample of the population.

As a result, the research is inferential.

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Most popular questions from this chapter

Best-Selling Albums. The Recording Industry Association of America provides data on the best-selling albums of all time. As of May 28, 2013, the top six best-selling albums of all time (U.S. sales only), are by the artists the Eagles (E), Michael Jackson (M), Pink Floyd (P), Led Zeppelin (L), AC/DC (A), and Billy Joel (B).

(a). List the 15 possible samples (without replacement) of two artists that can be selected from the six. For brevity, use the initial provided.

(b). Describe a procedure for taking a simple random sample of two artists from the six.

(c). If a simple random sampling procedure is used to obtain two artists, what are the chances of selecting P and A? M and E?

Regarding observational studies and designed experiments:

(a) Describe each type of statistical study.

(b) With respect to possible conclusions, what important difference exists between these two types of statistical studies?

In sampling, explain why obtaining a representative sample is important.

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

Dow Jones Industrial Averages. From the Stock Performance Guide, published online by Istockl on the website 1Stock1.com, we found the closing values of the Dow Jones Industrial Averages as of the end of December for the years 2004 through 2013.

Lobbying Congress. In the special report, "Bitter Pill: Why Medical Bills Are Killing Us" (TIME, Vol. 181, No. 8, 2013), S. Brill presented an in-depth investigation of hospital billing practices that reveals why U.S. health care spending is out of control. One of the many statistics provided in the report is that, during the period from 1998 through 2012, the pharmaceutical and health-care-products industries and organizations representing doctors, hospitals, nursing homes, health services, and HMOs spent \(5.36 billion lobbying Congress.

(a). Under what conditions would the \)5.36 billion lobbying-expenditure figure be a descriptive statistic? Explain your answer.

(b). Under what conditions would the $5.36 billion lobbying- expenditure figure be an inferential statistic? Explain your answer.
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