Transcription of 10 Hypothesis Testing with Two Independent Samples
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MATH1015 BiostatisticsWeek 1010 Hypothesis Testing with TwoIndependent SamplesPreviously we have studied: the one-samplet-test for population mean , using theinformation provided by a single sample; the one-samplez-test for population proportionp, basedon one sample; the matched pairst-test based on two observations on each(or identical) subject (which reduces to the one-samplet-test for differenced data).This week we consider an extension of the above work and studymethods to comparetwo population meansandtwo populationproportions, both based on two Independent Samples from Two-samplet-test comparing two popu-lation means ( ) IntroductionIn every area of human activity, new procedures are invented andexisting techniques are revised .
• the one-sample z-test for population proportion p, based on one sample; ... existing techniques are revised. Advances occur whenever a new technique is proved to be better than the old. Hence we need ... One-sided t-test-2.262 0 1.94 t9 P-value=0.084 a=0.05 (RR) 0.042 0.042
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