Decide on the level of measurement for each variable and then choose "Parametric" or "Nonparametric" on the basis of this general rule -- ignoring any exceptions with which you may be familiar.
1. Once a month, the quality assurance department of a light bulb manufacturing company test-burns 50 light bulbs, operating them continuously until they all burn out, to make sure that, on average, the bulbs last as long as the marketing department claims they last. _____
2. A climatologist carefully compiles records of the number of named Atlantic Ocean and Gulf of Mexico hurricanes for each year of a thirty year period, as well as the mean global surface air temperature for each of the same years, in an effort to determine whether global warming has affected the number of hurricanes that occur each year. __
3. In every U.S. general election year, the TV news shows vie with each other to "call" the election, trying to be the first to accurately predict which candidate will be elected as the next President. _____
4. An old TV commercial used to claim that 9 out of 10 dentists recommend a certain brand of toothpaste. Suppose you wanted to verify that claim. You randomly invite a panel of dentists to vote on the toothpaste that they recommend, and you examine the results to see whether the assertion is valid. _____
5. You are manager of manufacturing for a PC company. One of your factories has three independent production lines, all operating at full capacity to produce the same model of computer. Or are they? You begin to suspect that the night shift on line 2 is producing significantly fewer computers than the other two lines on that shift. To discover whether that's true, you pull the production records to see how many computers were produced on each night shift, for each production line, for the past two weeks. _____
6. Oops! You're that same manager of manufacturing, but you discover that you don't have the production records for the last two weeks. That database got trashed in a recent systems failure and you can't wait for it to be restored from backup. But you've got the total number of computers produced by each production line for last night's shift. You try to draw a conclusion from a single night shift's production totals. ___
7. A university wants to document the fact that the educational experiences that they deliver to their students are having the desired effect, so they administer a standardized test to a randomly selected group of incoming freshmen. Four years later, they ask the same students to retake the same test to see how much their scores have improved. ____
8. A human resources manager performs a study to learn whether the salaries of comparably qualified men and women in the company are different from each other. ___
9. A pharamaceutical company must test a new drug to make sure it is safe and effective, before putting it on the market. After completing animal testing of the new drug, the company administers it to human volunteers and keeps track of the number of patients who die within a period of time after taking the drug. They also administer a placebo to a control group and keep track of the number of those patients who die over the same period. ____
10. A political behavior study is conducted to see whether party preference is independent of educational level. A survey instrument is used, asking for the respondent's party preference and education (allowing selection from these options: "Didn't complete high school", "Completed high school", "Some college", "Baccalaureate degree", "Advanced degree"). _____
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