Chapter 1: Q26 (page 11)
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.
The samples are collected through voluntary response sampling.
Over 30 million students worldwide already upgrade their learning with Vaia!
All the tools & learning materials you need for study success - in one app.
Get started for free
Identify whether the given value is a statistic or a parameter.
In a study of American Airlines flights from JFK in New York to LAX in Los Angeles, 48 flights are randomly selected and the average (mean) arrival time is 8.9 minutes late.
In Exercises 29–36, answer the given questions, which are related to percentages.
Percentages in Negotiations When the author was negotiating a contract for the faculty and administration at a college, a dean presented the argument that if faculty receive a 4% raise and administrators receive a 4% raise, that’s an 8% raise and it would never be approved. What’s wrong with that argument?
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.
Conclusion: If we analyze the sample data and conclude that there is a correlation between white blood cell counts and red blood cell counts, does it follow that higher white blood cell counts are the cause of higher red blood cell counts?
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
| 1 | 2 | 3 | 4 | 5 | |
| 8 AM | 97 | 98.5 | 97.6 | 97.7 | 98.7 |
| 12 AM | 97.6 | 97.8 | 98 | 98.4 | 98.4 |
Source: The listed body temperatures were obtained from Dr. Steven Wasserman, Dr. Philip Mackowiak, and Dr. Myron Levine, who were researchers at the University of Maryland. Is the source of the data likely to be biased?
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
What do you think about this solution?
We value your feedback to improve our textbook solutions.
