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Chapter 1: Q7BSC (page 1)

Determine whether the given source has the potential to create a bias in a statistical study.

Brain Size. A data set in Appendix B includes brain volumes from 10 pairs of monozygotic (identical) twins. The data were collected by researchers at Harvard University, Massachusetts General Hospital, Dartmouth College, and the University of California at Davis.

Short Answer

Expert verified

No, the source mentioned in the study does not have any scope for bias.

Step by step solution

01

Given information

A study is conducted on ten pairs of identical twins for their recorded brain volumes.

The organizations involved in the collection of data for the study are

  • Harvard University,
  • Massachusetts General Hospital,
  • Dartmouth College, and
  • the University of California at Davis.
02

Explain the bias at the source

No, there is no possibility of a bias in the study.

The study on 10 pairs of twins is based on data gathered by experts from four prestigious institutes. The institutions are internationally renowned and conduct research projects that are critical to individuals.

As a result, the institutions can be relied upon to provide unbiased data for the study.

Thus, there is no possibility of a bias in the study.

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Most popular questions from this chapter

In Exercises 29–36, answer the given questions, which are related to percentages.

Chillax USA Today reported results from a Research Now for Keurig survey in which 1458 men and 1543 women were asked this: “In a typical week, how often can you kick back and relax?”

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e. Consider the question that the subjects were asked. Is that question clear and unambiguous so that all respondents will interpret the question the same way? How might the survey be improved?

In Exercises 29–36, answer the given questions, which are related to percentages.

Chillax USA Today reported results from a Research Now for Keurig survey in which 1458 men and 1543 women were asked this: “In a typical week, how often can you kick back and relax?”

a. Among the women, 19% responded with “rarely, if ever.” What is the exact value that is 19% of the number of women surveyed?

b. Could the result from part (a) be the actual number of women who responded with “rarely, if ever”? Why or why not?

c. What is the actual number of women who responded with “rarely, if ever”?

d. Among the men who responded, 219 responded with “rarely, if ever.” What is the percentage of men who responded with “rarely, if ever.”?

e. Consider the question that the subjects were asked. Is that question clear and unambiguous so that all respondents will interpret the question the same way? How might the survey be improved?

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