**Unformatted text preview: **= m z n m z n Large-sample Significance Tests: Test Statistic: error standard ) H parameter(-estimate z = obs P-value: ) ( P : Tailed-Lower ) P( : tailed-er Upp ) 2P( : tailed-2 obs obs obs z Z z Z z Z ≤ ≥ ≥ Rejection Region ( α =P(Type I Error)): α z z z z z z obs obs obs-≤ ≥ ≥ : Tailed-Lower : Tailed-Upper | | : Tailed-2 2 / Difference between two means: Estimate: 2 1 X X-Standard Error: 2 2 2 1 2 1 n n +...

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