Chapter 10HypothesisTesting with Two Samples.ppt

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1、 2002 Thomson / South-Western,Slide 10-1,Chapter 10Hypothesis Testing with Two Samples, 2002 Thomson / South-Western,Slide 10-2,Learning Objectives,Test hypotheses about the difference in two population means using data from large independent samples. Test hypotheses about the difference in two popu

2、lation means using data from small independent samples when the populations are normally distributed., 2002 Thomson / South-Western,Slide 10-3,Learning Objectives, continued,Test hypotheses about the mean difference in two related populations when the populations are normally distributed. Test hypot

3、heses about the differences in two population proportions. Test hypotheses about two population variances when the populations are normally distributed., 2002 Thomson / South-Western,Slide 10-4,Hypothesis Testing about the Difference in Two Sample Means,Population 2, 2002 Thomson / South-Western,Sli

4、de 10-5,Hypothesis Testing about the Difference in Two Sample Means, 2002 Thomson / South-Western,Slide 10-6,Z Formula for the Difference in Two Sample Means for n1 30, n2 30, and Independent Samples, 2002 Thomson / South-Western,Slide 10-7,Example: Hypothesis Testing for Differences Between Means (

5、Part 1), 2002 Thomson / South-Western,Slide 10-8,Example: Hypothesis Testing for Differences Between Means (Part 2), 2002 Thomson / South-Western,Slide 10-9,Example: Hypothesis Testing for Differences Between Means (Part 3), 2002 Thomson / South-Western,Slide 10-10,Example: Hypothesis Testing for Di

6、fferences between Means (Part 4), 2002 Thomson / South-Western,Slide 10-11,Demonstration Problem 10.1 (Part 1), 2002 Thomson / South-Western,Slide 10-12,Demonstration Problem 10.1 (Part 2), 2002 Thomson / South-Western,Slide 10-13,The t Test for Differences in Population Means,Each of the two popula

7、tions is normally distributed. The two samples are independent. At least one of the samples is small, n 30. The values of the population variances are unknown. The variances of the two populations are equal, 12 = 22, 2002 Thomson / South-Western,Slide 10-14,t Formula to Test the Difference in Means

8、Assuming 12 = 22, 2002 Thomson / South-Western,Slide 10-15,Hernandez Manufacturing Company (Part 1), 2002 Thomson / South-Western,Slide 10-16,Hernandez Manufacturing Company (Part 2), 2002 Thomson / South-Western,Slide 10-17,Hernandez Manufacturing Company (Part 3), 2002 Thomson / South-Western,Slid

9、e 10-18,Dependent Samples,Before and After Measurements on the same individual Studies of twins Studies of spouses, 2002 Thomson / South-Western,Slide 10-19,Formulas for Dependent Samples, 2002 Thomson / South-Western,Slide 10-20,Sampling Distribution of Differences in Sample Proportions, 2002 Thoms

10、on / South-Western,Slide 10-21,Z Formula for the Difference in Two Population Proportions, 2002 Thomson / South-Western,Slide 10-22,Z Formula to Test the Difference in Population Proportions, 2002 Thomson / South-Western,Slide 10-23,Testing the Difference in Population Proportions: Demonstration Pro

11、blem 10.4, 2002 Thomson / South-Western,Slide 10-24,Demonstration Problem 10.4, continued, 2002 Thomson / South-Western,Slide 10-25,Hypothesis Testing about the Difference in Two Population Variances,F Test for Two Population Variances, 2002 Thomson / South-Western,Slide 10-26,Example: An F Distribu

12、tion for 1 = 10 and 2 = 8, 2002 Thomson / South-Western,Slide 10-27,A Portion of the F Distribution Table for = 0.025, 2002 Thomson / South-Western,Slide 10-28,Hypothesis Test for Equality of Two Population Variances: Sheet Metal Example (Part 1), 2002 Thomson / South-Western,Slide 10-29,Sheet Metal Example (Part 2), 2002 Thomson / South-Western,Slide 10-30,Sheet Metal Example (Part 3),