EstimationandHypothesisTestingforTwoPopulationParameters文件材料.ppt

Business Statistics: A Decision-Making Approach 6th Edition;Chapter Goals;Population means, independent samples;Population means, independent samples;Population means, independent samples;Population means, independent samples;Population means, independent samples;Population means, independent samples;Population means, independent samples;Paired Samples;Paired Differences;Paired Differences;Hypothesis Tests for the Difference Between Two Means;Hypothesis Tests forTwo Population Proportions;Hypothesis tests for μ1 – μ2 ;Population means, independent samples;Population means, independent samples;Population means, independent samples;Two Population Means, Independent Samples;Pooled sp t Test: Example;Calculating the Test Statistic;;The test statistic for d is;Lower tail test: H0: μd ? 0 HA: μd 0; Assume you send your salespeople to a “customer service” training workshop. Is the training effective? You collect the following data: ; Has the training made a difference in the number of complaints (at the 0.01 level)? ;Two Population Proportions;Confidence Interval forTwo Population Proportions;Hypothesis Tests forTwo Population Proportions;Two Population Proportions;Two Population Proportions;Hypothesis Tests forTwo Population Proportions;Example: Two population Proportions;The hypothesis test is:;The test statistic for p1 – p2 is:;Two Sample Tests in EXCEL;Two Sample Tests in PHStat;Two Sample Tests in PHStat;Two Sample Tests in PHStat;Chapter Summary