Practice Final Spring 2015 Solutions - Practice Final 1...

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Practice Final 1 Problem 1 Identifying elements of a study and appropriate statistical inference From January 5 to 7, 2015, Hart Research Associates conducted a national survey on the issue of the federal minimum wage. Interviews were conducted online among a representative national sample of 1,002 adults. Respondents answered the following question: “Do you support raising the federal minimum wage to $15.00/hour over the next 5 years?”. The only options were "Support" and "Do not support". Thesurvey results showed that 63% of those who responded supported this proposal. 1.1What kind of study is this? a)Cross-sectional survey b)Prospective longitudinal cohort c)Case-control study d)Cross-sectional experiment e)None of the above
1.2What is the population parameter of interest?
1.3What is the distribution of the individual-level outcome in the population?
1.4What is the distribution of the combination of outcomes in the population?
1.5What is the sample estimate of the population parameter, and what is its approximate sampling distribution? (formula with expected value and standard deviation) 𝑝̂ ~ ? (𝑝,𝑝(1 − 𝑝)?)1.6How do we define the sampling distribution of the estimate for testing the null hypothesis 𝐻0: 𝑝 = 𝑝0? (𝑝0,𝑝0(1 − 𝑝0)?)?
Practice Final 2 1.7How do we define the sampling distribution of the estimate for constructing a confidence interval? NOTE! Ignore this question. The sampling
Practice Final 3

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