1-10 even numbers only
r = 0.520. 12. Using the data from Exercise 8 "Heights of Fathers and Sons," the linear correlation coef- ficient is r = -0.017. Chapter Quick Quiz 1. BAC When constructing a table representing the frequency distribution of blood alcohol content (g/dL) of drunk drivers involved in fatal car crashes, the first two classes of a fre- quency distribution are 0.08 - 0.1 1 and 0.12 - 0.15. What is the class width? 2. BAC Using the same first two classes from Exercise 1, identify the class boundaries of the first class. 3. BAC The first class described in Exercise 1 has a frequency of 36. If you know only the class limits given in Exercise 1 and the frequency of 36, can you identify the original 36 data values? 4. BAC A stemplot is created from the ages of drunk drivers involved in fatal car crashes and the first row is 1 1 67889. Identify the values represented by that row. 5. Reaction Times A large sample is randomly selected from a normally distributed popula- tion of reaction times, and a histogram is constructed from a frequency distribution. What is the shape of the histogram? 6. Tylenol In testing samples of regular Tylenol pills to verify that they have close to the de- sired amount of 325 mg of acetaminophen, which important characteristic of data is missing from this list: center, distribution, outliers, changes over time? 7. Tylenol A quality control manager wants to monitor the production of regular Tylenol pills to be sure that the mean amount of acetaminophen does not change over time. Which of the fol- lowing graphs is most helpful for that purpose: histogram, Pareto chart, pie chart, scatterplot, time-series graph, dotplot? 8. Blood Pressure In an investigation of the relationship between systolic blood pressure and diastolic blood pressure, which of the following graphs is most helpful: histogram; pie chart; scatterplot; stemplot; dotplot? 9. Blood Pressure Thing The W. A. Baum Company manufactures sphygmomanometers used to measure blood pressure. Quality control managers at such companies monitor defects and identify various causes, including worn machinery, human error, bad supplies, and packag ing mistreatment. Which of the following graphs would be best for describing the causes of defects: histogram, scatterplot, Pareto chart, dotplot, stemplot? 10. Frequency Distribution and Histogram What is the basic difference between a fre- quency distribution and a histogram? Review Exercises
