ChE253K Lecture17 -- HT Two Means.Rev03

# ChE253K Lecture17 -- HT Two Means.Rev03 - Class Business HW...

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1 ChE 253K Lecture 17 Class Business HW 7 Due Friday (or today if closed) HW 8 Due This Wednesday HW 9 Due Next Wednesday Team Exercise Wednesday I will return Paper #2, or else . .. Read Ch. 7, Sections 7.3-7.6

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2 ChE 253K Lecture 17 Hypothesis Testing Sample vs. Sample Mean Lecture 17 -- Inferential Statistics
3 ChE 253K Lecture 17 Hypo Tests: What’s Important?

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4 ChE 253K Lecture 17 -4 -2 0 2 4 Difference/Uncertainty = Probability ( 29 2 2 1 2 Probability t Z x Z n F Z e dt μ σ π - - = = =
5 ChE 253K Lecture 17 -4 -2 0 2 4 Standard for Accept/Reject Ho Accept Ho if the sample results are not too improbable Reject Ho if the sample results are highly improbable

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6 ChE 253K Lecture 17 Statement of the H.T. Problem State a claim about two well-defined samples and their means: equal, greater, less Translate the claim into hypotheses Null Hyp (H 0 ) = Claim’s antithesis Invalidate Alt Hyp (H 0 ) = Claim Prove by contradiction Set the acceptance criteria: Critical α Reject H 0 only if . .. it is only α probable Measure and calculate mean & std dev
7 ChE 253K Lecture 17 Complete & Elaborate HT Procedure

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## This note was uploaded on 02/25/2010 for the course CHE 253k taught by Professor Staff during the Spring '08 term at University of Texas at Austin.

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ChE253K Lecture17 -- HT Two Means.Rev03 - Class Business HW...

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