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STAB22H3 (208)
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Lecture

# STAB22-LEC23-(25).docx

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School
University of Toronto Scarborough
Department
Statistics
Course
STAB22H3
Professor
Ken Butler
Semester
Fall

Description
LEC23 STAB22THIS IS THE LAST OFFICIAL LECTURE THE NEXT LECTURE WILL BE REVIEW AND QA 291 CHAPTER 25 PAIRED SAMPLES AND BLOCKS QUESTION Company institutes exercise break for its workers assess workers satisfaciton before and after implementation of exercise program methods from last chapter comparing two means does not apply here because these two are matched pairs aka Paired data2 measurements coming from each worker 10 workers each had satisfaction beforeafterif had 20 workers out of which 10 workers were doing Before while another 10 different workers were doing After then this would be twosample situation and so use chapter 24 methods 292 DOING A PAIRED TTEST AND MAKING A PAIRED TINTERVAL1 Add another column to data Differenceex can get differences from AfterBefore or BeforeAfter either way wil suffice for this ex he did AfterBefore2 Hypotheses H0 0HAa 0 or b 0orc 0which alternative is used dep on test ex in this case we are using onesided ttesta 02 Calculate tstatistic and look up interval of Pvalue from Table T that corresponds to this tstatistic
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