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Chapter 1: Q25BSC (page 1)

What’s Wrong? In Exercises 25–28, identify what is wrong.

Potatoes In a poll sponsored by the Idaho Potato Commission, 1000 adults were asked to select their favorite vegetables, and the favorite choice was potatoes, which were selected by 26% of the respondents.

Short Answer

Expert verified

The Idaho Potato Commission conducted the survey, which resulted in 26% of the respondents favoring the vegetable potato.

Step by step solution

01

Given information

The number of adults surveyed for their favorite vegetable was 1000. The survey was sponsored by the organization Idaho Potato Commission.

Results of the survey: 26% chose potato as their favorite vegetable.

02

The sampling procedure

The survey looks for the most favorite vegetable in the population. Among the 1000 selected sample adults, 26% opted for potato.

It is further known that a potato commission sponsored the survey.

03

Identifying the wrong element in the survey

The results are very likely to be biased in the survey.

The responses of 26% for potatoes are significantly high, but it seems to be biased as the poll was conducted in the sponsorship of an organization that deals in potatoes.

Thus, there are high chances that the results are biased in the study.

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Most popular questions from this chapter

Determine whether the data are from discrete data or continuous data set.

McDonald’s In a study of service times at a McDonald’s drive-up window, the numbers of cars serviced each hour of several days are recorded.

In Exercises 17–20, refer to the sample of body temperatures (degrees Fahrenheit) in the table below. (The body temperatures are from a data set in Appendix B.).

Subject


12345
8 AM9798.597.697.798.7
12 AM97.697.89898.498.4

Conclusion If we analyze the listed body temperatures with suitable methods of statistics, we conclude that when the differences are found between the 8 AM body temperatures and the 12 AM body temperatures, there is a 64% chance that the differences can be explained by random results obtained from populations that have the same 8 AM and 12 AM body temperatures. What should we conclude about the statistical significance of those differences?

Identify whether the given value is a statistic or a parameter.

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Reported versus Measured. In a survey of 1046 adults conducted by Bradley Corporation, subjects were asked how often they wash their hands when using a public restroom, and 70% of the respondents said “always.”

a. Identify the sample and the population.

b. Why would better results be obtained by observing hand washing instead of asking about it?

In Exercises 17–20, refer to the sample of body temperatures (degrees Fahrenheit) in the table below. (The body temperatures are from a data set in Appendix B.).

Conclusion If we analyze the listed body temperatures with suitable methods of statistics, we conclude that when the differences are found between the 8 AM body temperatures and the 12 AM body temperatures, there is a 64% chance that the differences can be explained by random results obtained from populations that have the same 8 AM and 12 AM body temperatures. What should we conclude about the statistical significance of those differences?
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