7.1 Identifying and Estimating the Target Parameter 343 7.2 Confidence Interval for a Population Mean: Normal (z) Statistic 345 7.3 Confidence Interval for a Population Mean: Student’s t-Statistic 355 7.4 Large-Sample Confidence Interval for a Population Proportion 7.5 Determining the Sample Size 372 7.6 Confidence Interval for a Population Variance (Optional) 379 Statistics in Action: Medicare Fraud Investigations 343 Using Technology: MINITAB: Confidence Intervals 392 TI-83/TI-84 Plus Graphing Calculator: Confidence Intervals 394 365 Chapter 8 inferences Based on a Single Sample: Tests of hypothesis 396 8.1 The Elements of a Test of Hypothesis 397 8.2 Formulating Hypotheses and Setting Up the Rejection Region 403 8.3 Observed Significance Levels: p-Values 408 8.4 Test of Hypothesis about a Population Mean: Normal (z) Statistic 413 8.5 Test of Hypothesis about a Population Mean: Student’s t-Statistic 421 8.6 Large-Sample Test of Hypothesis about a Population Proportion 428 8.7 Calculating Type II Error Probabilities: More about b (Optional) 436 8.8 Test of Hypothesis about a Population Variance (Optional) 445 Statistics in Action: Diary of a KLEENEX® User—How Many Tissues in a Box? 397 Using Technology: MINITAB: Tests of Hypotheses 458 TI-83/TI-84 Plus Graphing Calculator: Tests of Hypotheses 459 Chapter 9 inferences Based on Two Samples: Confidence intervals and Tests of hypotheses 461 9.1 Identifying the Target Parameter 462 9.2 Comparing Two Population Means: Independent Sampling 463 9.3 Comparing Two Population Means: Paired Difference Experiments 481 9.4 Comparing Two Population Proportions: Independent Sampling 493 9.5 Determining the Sample Size 501 9.6 Comparing Two Population Variances: Independent Sampling (Optional) 506
