The researcher planning the study in South Africa also will estimate the population proportion having at least a high school education. No information is available about its value. How large a sample size is needed to estimate it to within 0.07 with 95% confidence?
Answer to relevant QuestionsThe Harvard study mentioned in the previous exercise estimated that 19% of college students abstain from drinking alcohol. To estimate this proportion in your school, how large a random sample would you need to estimate it ...Explain the reasoning behind the following statement: “In studies about a very diverse population, large samples are often necessary, whereas for more homogeneous populations smaller samples are often adequate.” ...A July 2011 Gallup poll based on the responses of 1500 adults indicated that 46% of Americans approve of the job Barack Obama is doing as president. One way to summarize the findings of the poll is by saying, “It is ...The General Social Survey has asked respondents, “Do you think the use of marijuana should be made legal or not?” Go to the GSS Web site, sda.berkeley.edu/GSS. For the 2008 survey with variable GRASS: a. Of the ...Refer to the previous exercise. Interpret each item on the following printout that software reports for psychologists with a doctorate but with less than one year of experience.
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