Stat 211 Handout 9 (Chapter 9): Inferences Based on Two Samples tests
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The
estimator for p is
Test statistics:
Decision can be made in one of the two ways:
Let z* be the computed test statistic values.
Lower
tailed test
P-value = P(z
Upper tailed test
P-value = P(z>z*)
Two-tailed test
P-value = 2P(z > |z*| )=2P(z <- |z*| )
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