Chapter 1: Q5CQQ (page 1)
Birth Weights Which of the following best describes the level of measurement of the birth weights described in Exercise 3: nominal, ordinal, interval, ratio?
Ratio data
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Determine whether the data are from discrete data or continuous data set.
Smartphones Students in a statistics class record the exact lengths of times that they surreptitiously use their smartphones during class
Quantitative/categorical DataIdentify each of the following as quantitative data or categorical data.
a. The platelet counts in Data Set 1 “Body Data” in Appendix B.
b. The cigarette brands in Data Set 13 “Cigarette Contents” in Appendix B.
c. The colours of the M&M candies in Data Set 27 “M&M Weights” in Appendix B.
d. The weights of the M&M candies in Data Set 27 “M&M Weights” in Appendix B.
In Exercises 29–36, answer the given questions, which are related to percentages.
Workplace Attire In a survey conducted by Opinion Research Corporation, 1000 adults were asked to identify “what is inappropriate in the workplace.” Of the 1000 subjects, 70% said that miniskirts were not appropriate in the workplace.
a. What is 70% of 1000?
b. Among the 1000 respondents, 550 said that shorts are unacceptable in the workplace. What percentage of respondents said that shorts are unacceptable in the workplace?
In Exercises 21–24, refer to the data in the table below. The entries are white blood cell counts (1000 cells,ML) and red blood cell counts (million cells,ML) from male subjects examined as part of a large health study conducted by the National Center for Health Statistics. The data are matched, so that the first subject has a white blood cell count of 8.7 and a red blood cell count of 4.91, and so on.
Context Given that the data are matched and considering the units of the data, does it make sense to use the difference between each white blood cell count and the corresponding red blood cell count? Why or why not?
What’s Wrong? In Exercises 25–28, identify what is wrong.
Healthy Water In a USA Today online poll, 951 Internet users chose to respond, and 57% of them said that they prefer drinking bottled water instead of tap water.
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