tailieunhanh - Ebook Statistics - The art and science of learning from data (4th edition): Part 2

(BQ) Part 2 book "Statistics - The art and science of learning from data" has contents: Statistical inference - confidence intervals; comparing two groups, multiple regression, nonparametric statistics, comparing groups - analysis of variance methods,.and other contents. | Part Inferential Statistics 3 Chapter 8 Statistical Inference: Confidence Intervals Chapter 9 Statistical Inference: Significance Tests About Hypotheses Chapter 10 Comparing Two Groups 359 ChaPter 8 The tools from previous chapters, in particular the idea of the normal distribution as a sampling distribution, are used in this chapter to turn information from a sample into an interval of plausible values for an unknown population proportion or population mean. Point and Interval Estimates of Population Parameters Constructing a Confidence Interval to Estimate a Population Proportion Constructing a Confidence Interval to Estimate a Population Mean Choosing the Sample Size for a Study Using Computers to Make New Estimation Methods Possible 360 Statistical Inference: Confidence Intervals Example 1 Analyzing Data from the General Social Survey Picture the Scenario For more than 30 years, the National Opinion Research Center at the University of Chicago (. ) has conducted an opinion survey called the General Social Survey (GSS). The survey randomly samples about 2000 adult Americans. In a 90-minute in-person interview, the interviewer asks a long list of questions about opinions and behavior for a wide variety of issues. Other nations have similar surveys. For instance, every five years Statistics Canada conducts its own General Social Survey. Eurobarometer regularly samples about 1000 people in each country in the European Union and a host of other polling institutions, such as Gallup (), the Pew Research Center (), or Nielsen (), feature results from all sorts of polls on their websites. Analyzing such data helps researchers learn about how people think and behave at a given time and track opinions over time. Activity 1 in Chapter 1 showed how to access the GSS data at . Questions to Explore Based on data from