xyMar5Lec19 - Two-Sided Testing and C.I. s; Choosing the...

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Two-Sided Testing and C.I. s; Choosing the Levels of Significance Chapter 8 3/19/12 1 Lecture 18 - Xuanyao He
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Two-sided hypothesis testing and confidence intervals A two-sided significance test rejects the null hypothesis exactly when the claim falls outside the corresponding confidence interval for µ . If the claim is in the CI à fail to reject H 0 If the claim is not in the CI à reject H 0 NOTE: must have “ ” in H a ! 3/19/12 2 Lecture 18 - Xuanyao He
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3/19/12 3 Lecture 18 - Xuanyao He
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revisit a few examples Metabolism C.I.? [-560.629, -169.171] P-Value? 0.002 Module C.I.? [-.11, 3.31] P-Value? .124 A confidence interval can be used as a basis for testing hypotheses, and there is a confidence interval procedure (with C = 1 – α ) corresponding to any particular test procedure with significance α . Remark: for two-sided test, use two-sided C.I.; for one-sided test, use C.I. in the same direction.
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This note was uploaded on 03/26/2012 for the course STAT 350 taught by Professor Staff during the Spring '08 term at Purdue University-West Lafayette.

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xyMar5Lec19 - Two-Sided Testing and C.I. s; Choosing the...

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