Quiz71 - Obama's initial overall job approval ratings The...

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Name: _______________________ Statistics Quiz #7: Chapters 11 and 12 1. Suppose there is a baseball player who is having a great season and hits a home run once in every 4 at bats. Design a simulation to estimate how many times this baseball player needs to be at bat in order to get 2 home runs. Explain exactly how you would perform the simulation, how many times you would simulate and what you would do with your results to estimate the answer to the question. (continued on back)
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2. Identify the population, population parameter of interest, the sampling frame, sample, an example of a statistic, the sampling method (including if it’s random) and any potential sources of bias you can detect and any problems you see in generalizing to the population of interest The Jan. 30-Feb. 1  USA Today/ Gallup poll asked Americans to say whether they approve or disapprove of seven specific actions  Obama has taken as president. Americans' general support for most of these is in line with 
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Unformatted text preview: Obama's initial overall job approval ratings . The public does not agree with everything Obama has done, however. For example, more Americans say they disapprove (50%) than approve (44%) of his decision to order the closing of the Guantanamo Bay prison for terrorist suspects in Cuba within a year. Results are based on telephone interviews with 1,027 national adults, aged 18 and older, conducted Jan. 30-Feb. 1, 2009. The telephone numbers are randomly generated by a computer. a) Population: (describe in words) b) Parameter of interest: (describe in words) c) Sampling Frame: (describe in words) d) Sample: (describe in words) e) One example of a statistic from the article. Explain what it is measuring: f) Sampling Method (including if it’s random): g) Bias?...
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This note was uploaded on 04/12/2011 for the course STA 215 taught by Professor Tba during the Spring '08 term at Grand Valley State.

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Quiz71 - Obama's initial overall job approval ratings The...

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