(BQ) Part 2 book "Elementary statistics" has contents: Hypothesis testing with one sample, hypothesis testing with two samples, correlation and regression, chi square tests and the f-distribution, nonparametric tests. | 7 CHAPTER HYPOTHESIS TESTING WITH ONE SAMPLE Introduction to Hypothesis Testing Hypothesis Testing for the Mean (Large Samples) í CASE STUDY Hypothesis Testing for the Mean (Small Samples) í ACTIVITY Hypothesis Testing for Proportions í ACTIVITY Hypothesis Testing for Variance and Standard Deviation í USES AND ABUSES í REAL STATISTICS– REAL DECISIONS í TECHNOLOGY Computer software is protected by federal copyright laws. Each year, software companies lose billions of dollars because of pirated software. Federal criminal penalties for software piracy can include fines of up to $250,000 and jail terms of up to five years. WHERE YOU’VE BEEN ĪĪ In Chapter 6, you began your study of inferential statistics. There, you learned how to form a confidence interval estimate about a population parameter, such as the proportion of people in the United States who agree with a certain statement. For instance, in a nationwide poll conducted by Harris Interactive on behalf of the Business Software Alliance (BSA), . students ages 8 to 18 years were asked several questions about their attitudes toward copyright law and Internet behavior. Here are some of the results. Survey Question Number Surveyed Number Who Said Yes 1196 361 1196 95 1196 133 Have you ever downloaded music from the Internet without paying for it? Have you ever downloaded movies from the Internet without paying for them? Have you ever downloaded software from the Internet without paying for it? W H E R E Y O U ’ R E G O I N G ĪĪ Is your sample statistic different enough from the claim (p = to decide that the claim is false? The answer lies in the sampling distribution of sample proportions taken from a population in which p = . The graph below shows that your sample statistic is more than 4 standard errors from the claimed value. If the claim is true, the probability of the sample statistic being 4 standard errors or more from the claimed value is .
