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Chapter 1: Q.56 (page 53)

For the following exercises, identify the type of data that would be used to describe a response (quantitative discrete, quantitative continuous, or qualitative), and give an example of the data. time in line to buy groceries.

Short Answer

Expert verified

A quantitative continuous type of data is 'time spent in line to buy groceries.

Example: time in line to buy grocery by 2 days.

Step by step solution

01

To determine

The mentioned line also gives an example of such type of data, whether quantitative discrete, quantitative continuous, or qualitative.

02

Explanation

We can watch quantitative discrete data in a real line at regular intervals, or we can view data in simply integer format. To keep track of time while waiting in line for groceries, we must use an integer time point that cannot be a decimal. Because a grocery store cannot provide a delivery schedule in fractions, it cannot be delivered in 2.45 days. As a result, the right response is quantitative discrete.

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Most popular questions from this chapter

In advance of the 1936Presidential Election, a magazine titled Literary Digest released the results of an opinion poll predicting that the republican candidate Alf Landon would win by a large margin. The magazine sent post cards to approximately 10,000,000prospective voters. These prospective voters were selected from the subscription list of the magazine, from automobile registration lists, from phone lists, and from club membership lists. Approximately 2,300,000people returned the postcards.

a. Think about the state of the United States in 1936. Explain why a sample chosen from magazine subscription lists, automobile registration lists, phone books, and club membership lists was not representative of the population of the United States at that time.

b. What effect does the low response rate have on the reliability of the sample?

c. Are these problems examples of sampling error or non sampling error?

d. During the same year, George Gallup conducted his own poll of 30,000prospective voters. These researchers used a method they called "quota sampling" to obtain survey answers from specific subsets of the population. Quota sampling is an example of which sampling method described in this module?

1.13A local radio station has a fan base of 20,000listeners. The station wants to know if its audience would prefer

More music or more talk shows. Asking all 20,000listeners is an almost impossible task.

The station uses convenience sampling and surveys the first 200people they meet at one of the station鈥檚 music concert events. 24people said they鈥檇 prefer more talk shows, and 176 people said they鈥檇 prefer more music.

Do you think that this sample is representative of (or is characteristic of) the entire 20,000listener population?

A question on a survey reads: "Do you prefer the delicious taste of Brand X or the taste of Brand Y?" Is this a fair question?

The graph in Figure 1.15shows the number of complaints for six different airlines as reported to the US Department of Transportation in February 2013. Alaska, Pinnacle, and Airtran Airlines have far fewer complaints reported than American, Delta, and United. Can we conclude that American, Delta, and United are the worst airline carriers since they have the most complaints?

Use the following information to answer the next seven exercises: Studies are often done by pharmaceutical companies to determine the effectiveness of a treatment program. Suppose that a new AIDS antibody drug is currently under study. It is given to patients once the AIDS symptoms have revealed themselves. Of interest is the average (mean) length of time in months patients live once starting the treatment. Two researchers each follow a different set of 40 AIDS patients from the start of treatment until their deaths. The following data (in months) are collected.

Researcher A: 3; 4; 11; 15; 16; 17; 22; 44; 37; 16; 14; 24; 25; 15; 26; 27; 33; 29; 35; 44; 13; 21; 22; 10; 12; 8; 40; 32; 26; 27; 31; 34; 29; 17; 8; 24; 18; 47; 33; 34

Researcher B: 3; 14; 11; 5; 16; 17; 28; 41; 31; 18; 14; 14; 26; 25; 21; 22; 31; 2; 35; 44; 23; 21; 21; 16; 12; 18; 41; 22; 16; 25; 33; 34; 29; 13; 18; 24; 23; 42; 33; 29

List two reasons why the data may differ.
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