Copyright © 2013 Pearson Education, Inc. All rights reserved Chapter 9 Inferences Based on Two Samples Confidence Intervals and Tests of Hypotheses.

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Presentation transcript:

Copyright © 2013 Pearson Education, Inc. All rights reserved Chapter 9 Inferences Based on Two Samples Confidence Intervals and Tests of Hypotheses

Copyright © 2013 Pearson Education, Inc. All rights reserved 9.1 Identifying the Target Parameter

9 - 3 Copyright © 2013 Pearson Education, Inc.. All rights reserved. Procedure

Copyright © 2013 Pearson Education, Inc. All rights reserved 9.2 Comparing Two Population Means: Independent Sampling

9 - 5 Copyright © 2013 Pearson Education, Inc.. All rights reserved. Table 9.1

9 - 6 Copyright © 2013 Pearson Education, Inc.. All rights reserved. Figure 9.1 SPSS analysis of diet study data

9 - 7 Copyright © 2013 Pearson Education, Inc.. All rights reserved. Figure 9.2 Sampling distribution of

9 - 8 Copyright © 2013 Pearson Education, Inc.. All rights reserved. Definition

9 - 9 Copyright © 2013 Pearson Education, Inc.. All rights reserved. Procedure

Copyright © 2013 Pearson Education, Inc.. All rights reserved. Procedure

Copyright © 2013 Pearson Education, Inc.. All rights reserved. Definition

Copyright © 2013 Pearson Education, Inc.. All rights reserved. Figure 9.3 Rejection region for Example 9.2

Copyright © 2013 Pearson Education, Inc.. All rights reserved. Figure 9.4 The observed significance level for Example 9.2

Copyright © 2013 Pearson Education, Inc.. All rights reserved. Figure 9.5 Assumptions for the two-sample t; (1) normal populations; (2) equal variances

Copyright © 2013 Pearson Education, Inc.. All rights reserved. Procedure

Copyright © 2013 Pearson Education, Inc.. All rights reserved. Procedure

Copyright © 2013 Pearson Education, Inc.. All rights reserved. Definition

Copyright © 2013 Pearson Education, Inc.. All rights reserved. Table 9.2

Copyright © 2013 Pearson Education, Inc.. All rights reserved. Figure 9.6 SAS printout for Example 9.4

Copyright © 2013 Pearson Education, Inc.. All rights reserved. Figure 9.7 Normal probability plots for Example 9.4

Copyright © 2013 Pearson Education, Inc.. All rights reserved. Figure 9.8 MINITAB box plots for Example 9.4

Copyright © 2013 Pearson Education, Inc.. All rights reserved. Procedure

Copyright © 2013 Pearson Education, Inc.. All rights reserved. Procedure

Copyright © 2013 Pearson Education, Inc.. All rights reserved. Figure SIA9.1 MINITAB comparison of two price change means

Copyright © 2013 Pearson Education, Inc.. All rights reserved. Figure SIA9.2 MINITAB comparison of two Trading volume means

Copyright © 2013 Pearson Education, Inc. All rights reserved 9.3 Comparing Two Population Means: Paired Difference Experiments

Copyright © 2013 Pearson Education, Inc.. All rights reserved. Table 9.3

Copyright © 2013 Pearson Education, Inc.. All rights reserved. Figure 9.9 MINITAB printout of an invalid analysis of reading test scores in 9.3

Copyright © 2013 Pearson Education, Inc.. All rights reserved. Table 9.4

Copyright © 2013 Pearson Education, Inc.. All rights reserved. Figure 9.10 Rejection region for Example 9.4

Copyright © 2013 Pearson Education, Inc.. All rights reserved. Figure 9.11 MINITAB paired difference analysis of reading test scores

Copyright © 2013 Pearson Education, Inc.. All rights reserved. Procedure

Copyright © 2013 Pearson Education, Inc.. All rights reserved. Procedure

Copyright © 2013 Pearson Education, Inc.. All rights reserved. Definition

Copyright © 2013 Pearson Education, Inc.. All rights reserved. Definition

Copyright © 2013 Pearson Education, Inc.. All rights reserved. Table 9.5

Copyright © 2013 Pearson Education, Inc.. All rights reserved. Figure 9.12 SAS analysis of salary differences

Copyright © 2013 Pearson Education, Inc.. All rights reserved. Figure 9.13 SPSS analysis of salaries, assuming independent samples

Copyright © 2013 Pearson Education, Inc.. All rights reserved. Procedure

Copyright © 2013 Pearson Education, Inc. All rights reserved 9.4 Comparing Two Population Proportions: Independent Sampling

Copyright © 2013 Pearson Education, Inc.. All rights reserved. Table 9.6

Copyright © 2013 Pearson Education, Inc.. All rights reserved. Definition

Copyright © 2013 Pearson Education, Inc.. All rights reserved. Procedure

Copyright © 2013 Pearson Education, Inc.. All rights reserved. Procedure

Copyright © 2013 Pearson Education, Inc.. All rights reserved. Definition

Copyright © 2013 Pearson Education, Inc.. All rights reserved. Table 9.7

Copyright © 2013 Pearson Education, Inc.. All rights reserved. Figure 9.14 Rejection region for Example 9.6

Copyright © 2013 Pearson Education, Inc.. All rights reserved. Figure 9.15 MINITAB output for test of two proportions

Copyright © 2013 Pearson Education, Inc.. All rights reserved. Figure SIA9.3 MINITAB comparison of two proportions analysis

Copyright © 2013 Pearson Education, Inc. All rights reserved 9.5 Determining the Sample Size

Copyright © 2013 Pearson Education, Inc.. All rights reserved. Procedure

Copyright © 2013 Pearson Education, Inc.. All rights reserved. Procedure

Copyright © 2013 Pearson Education, Inc. All rights reserved Comparing Two Population Variances: Independent Sampling (Optional) 9.6

Copyright © 2013 Pearson Education, Inc.. All rights reserved. Figure 9.16 An F-distribution with 7 numerator and 9 denominator degrees of freedom

Copyright © 2013 Pearson Education, Inc.. All rights reserved. Table 9.8

Copyright © 2013 Pearson Education, Inc.. All rights reserved. Figure 9.17 An F-distribution for  1 = 7 and  2 = 9 df;  =.05

Copyright © 2013 Pearson Education, Inc.. All rights reserved. Table 9.9

Copyright © 2013 Pearson Education, Inc.. All rights reserved. Figure 9.18 MINITAB summary statistics and F-test for mice weights

Copyright © 2013 Pearson Education, Inc.. All rights reserved. Figure 9.19 Rejection region for Example 9.10

Copyright © 2013 Pearson Education, Inc.. All rights reserved. Procedure

Copyright © 2013 Pearson Education, Inc.. All rights reserved. Procedure

Copyright © 2013 Pearson Education, Inc.. All rights reserved. Definition

Copyright © 2013 Pearson Education, Inc.. All rights reserved. Table 9.10

Copyright © 2013 Pearson Education, Inc.. All rights reserved. Figure 9.20 SAS F-test for testing assumption of equal variances

Copyright © 2013 Pearson Education, Inc.. All rights reserved. Procedure