7. Fill in the blank: A parameter is a numerical measurement describing some characteristic of a 8. Are movie ratings of G, PG-13. and R quantitative data or categorical data? 9. What is the level of measurement of data consisting of the book categories of science, liter ature, mathematics, and history (nominal, ordinal, interval, ratio)? 10. A pollster calls 500 randomly selected people, and all 500 respond to her first question Because the subjects agreed to respond, is the sample a voluntary response sample Review Exercises 1. Sampling Seventy-two percent of Americans squeeze their toothpaste tube from the top. This and other not-so-serious findings are included in The Firs Really Important Survy of American Habis. Those results are based on 7000 responses from the 25,000 questionnaires that were mailed. a. What is wrong with this survey? b. As stated, the value of 72% refers to all Americans, so is that 72% a statistic or a parameter? Explain. e. Does the survey constitute an observational study or an experiment? 2, Gallup Polls when Gallup andother polling organizations conduct poll, they typical ycon. tact subjects by telephone. In recen poll results likely to be valid if they are based on only those subjects who agree to respond? What should polling organizations do when they encounter a subject who refuses to respond? at years, many subjects refuse to cooperate with the poll. Are the 3. Identify the level of measurement (nominal, ordinal, interval, ratio) used in each of the following