Chapter Quiz 1. Identify the population and the sample in the following study. A study of 254 patients with sleep disorders was conducted to find a link between obesity and sleep disorders. 2. Determine whether the numerical value is a parameter or a statistic. (a) In a survey of a sample of parents, 53% said they protect their children from sun exposure using sunscreen. (Source: Morbidity and Mortality Weekly Report (b) In a union's vote, 67% of all union members voted to ratify a contract proposal. 3. Determine whether the data are qualitative or quantitative. (a) A database of student identification numbers (b) The test scores in a statistics class 4. Identify each data set's level of measurement. Explain your reasoning. (a) A list of the uniform numbers retired by each major league baseball team (b) The number of products sold by a toy manufacturer each quarter for the current fiscal year (c) The finishing times of the runners in the Boston marathon 5. Decide which method of data collection you would use to gather data for each study. Explain your reasoning. (a) A study on the effect of low dietary intake of vitamin C and iron on lead levels in adults (b) The ages of people living within 500 miles of your home 6. Identify which sampling technique was used in each study. Explain your reasoning. (a) A journalist goes to a beach to ask people how they feel about water pollution. (b) For quality assurance, every fifth engine part is selected from an assembly line and tested for durability. (c) A study on attitudes about smoking is conducted at a college. The students are divided by class (freshman, sophomore, junior, and senior). Then a random sample is selected from each class and interviewed. 7. Which sampling technique used in Exercise 6 could lead to a biased study? 8. Determine whether, each statement is true or false. If it is false, rewrite it as a true statement. (a) A parameter is a numerical measure that describes a sample characteristic