'Pooled sample proportion' diaporamas de présentation

Chapter 20

Chapter 20. Comparing Two Proportions. Case Study. Machine Reliability. A study is performed to test of the reliability of products produced by two machines. Machine A produced 8 defective parts in a run of 140, while machine B produced 10 defective parts in a run of 200.

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Chapter 20

Chapter 20. Comparing Two Proportions. Two-Sample Problems. The goal of inference is to compare the responses to two treatments or to compare the characteristics of two populations.

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Chapter 19

Chapter 19. Comparing Two Proportions. Two-Sample Problems. The goal of inference is to compare the responses to two treatments or to compare the characteristics of two populations. We have a separate sample from each treatment or each population.

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Chapter 19

Chapter 19. Comparing Two Proportions. Two-Sample Problems. The goal of inference is to compare the responses to two treatments or to compare the characteristics of two populations.

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Chapter 19

Chapter 19. Comparing Two Proportions. Outline. Two-sample problems: proportions The sampling distribution of a difference between proportions Large-sample confidence intervals for comparing proportions Significance tests for comparing proportions. 1. Two-sample problems: proportions.

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Inferences about two proportions

Inferences about two proportions. Inferences about two proportions. Notation: For Sample 1 population proportion size of sample number of successes sample proportion Note: , , and used for sample 2. Inferences about two proportions. Pooled sample proportion is denoted by:.

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