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Extra resources for Optimal Stopping Rules (Stochastic Modelling and Applied Probability)
The respondents were asked questions, but they were not given any treatment, so this is an example of an observational study. 23 24 Chapter 1 Clinical Trials vs. Observational Studies Introduction to Statistics Experiment: In the largest public health experiment ever conducted, 200,745 children were given a treatment consisting of the Salk vaccine, while 201,229 other children were given a placebo. The Salk vaccine injections constitute a treatment that modified the subjects, so this is an example of an experiment.
Quantitative/Categorical Data How do quantitative data and categorical data differ? 3. Discrete/Continuous Data Which of the following describe discrete data? a. The numbers of people surveyed in each of the next several Gallup polls b. The exact heights of individuals in a sample of several statistics students c. The number of Super Bowl football games that must be played before one of the teams scores exactly 75 points 4. Identifying the Population In a Gallup poll of 1010 adults in the United States, 55% of the respondents said that they used local TV stations daily as a source of news.
Also, explain what is wrong with the given calculation. 29. Political Parties In a preelection survey of likely voters, political parties of respondents are identified as 1 for a Democrat, 2 for a Republican, 3 for an Independent, and 4 for anything else. 7. 30. 0. 31. Lead Levels In Data Set 5 in Appendix B, blood lead levels are represented as 1 for low, 2 for medium, and 3 for high. 53. 32. World Series Champs As of this writing, the New York Yankees were the last team to win the World Series, and the numbers of the starting lineup are 2, 18, 25, 13, 20, 55, 24, 33, and 53.