10.1 Mean sd Known

# Statistic zstat x 0 n difference between 2 population

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Unformatted text preview: ts about the Difference between Two Population Means (σ1 and σ2 known) Population Mean test statistic upper tail test zSTAT = x −µ 0 σn H0: μ ≤ μ0 Ha: μ > μ0 reject H0 if zSTAT > zα or p-value<α Hypothesis Tests lower tail test H0: μ ≥ μ0 Ha: μ < μ0 reject H0 if zSTAT < zα or p-value<α two-tailed test H0: μ = μ0 Ha: μ ≠ μ0 reject H0 if zSTAT < –zα/2 or zSTAT > zα/2 or if p-value<α Recall from chapter 9 Hypothesis Tests about the Difference between Two Population Means (σ1 and σ2 known) Population Mean test statistic zSTAT = x −µ 0 σn Difference Between 2 Population Means (x1 − x2)− D0 zSTAT = 2 2 σ 1 + σ2 reject H0 if zSTAT > zα or p-value<α Hypothesis Tests lower tail test two-tailed test reject H0 if zSTAT > zα or p-value<α H0: μ ≥ μ0 Ha: μ < μ0 H0: μ1 – μ2 ≥ D0 Ha: μ1 – μ2 < D0 reject H0 if zSTAT < zα or p-value<α upper tail test H0: μ ≤ μ0 Ha: μ > μ0 n1 n2 H0: μ1 – μ2 ≤ D0 Ha: μ1 – μ2> D0 reject H0 if zSTAT < zα or p-value<α H0: μ = μ0 Ha: μ ≠ μ0 H0: μ1 – μ2 = D0 Ha: μ1 – μ2 ≠ D0 reject H0 if zSTAT < –zα/2 or zSTAT > zα/2 or if p-value<α reject H0 if zSTAT < –zα/2 or zSTAT > zα/2 or if p-value<α Hypothesis Tests about the Difference between Two Population Means (σ1 and σ2 known) SAFETY CHECK: When defining the difference in m...
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## This document was uploaded on 03/05/2014.

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