●●● ●●●● ●●●●● Set up hypothesis and confirm a 9.08 ●●●● ●●●● STEPS compute test statistic Find p value P<a Pa Make conclusion Reject Ho, the difference Don't reject Ho the is significant difference is not significant
2021/1/29 11 Set up hypothesis and confirm α Find P value compute test statistic Make conclusion Don’t reject H0, the difference is not significant Reject H0, the difference is significant. P≤α P>α STEPS
●●● ●●●● ●●●●● ●●●● Put forward null hypothesis and o 会, alternative hypo thesis 0 Ba y What is null hypothesis? 1. The test is designed to assess the strength of the evidence against Ho 2. It is denoted by Ho 0 0 21/1/29
2021/1/29 12 Put forward null hypothesis and alternative hypothesis What is null hypothesis? 1. The test is designed to assess the strength of the evidence against Ho. 2. It is denoted by H0 H0： = 0
●●● ●●●● ●●●●● ●●●● ●●●● Put forward null hypo thesis and 0000 oon alternative A一△ hypothesis What is alternative hypothesis? (1)It is contradictory to null hypothesis (2)It is denoted by H1 H1:μ<脚,μ>μOrμ≠μ 21/1/29
2021/1/29 13 What is alternative hypothesis? (1) It is contradictory to null hypothesis (2) It is denoted by H1 H1： < 0 ， 0 or 0 Put forward null hypothesis and alternative hypothesis
●●● ●●●● ●●●●● ●●●● ●●0●● ●●●● o Confirm significant level a ●●●● What is significant level? o a probability of rejecting a true null hypothesis - denoted by a (alpha) Generally, 0.05 e determined by the investigator in advance 21/1/29
2021/1/29 14 Confirm significant level What is significant level？ a probability of rejecting a true null hypothesis denoted by α (alpha) Generally, 0.05. determined by the investigator in advance
●●● ●●●● ●●●●● ●●●● ●●0●● ●●●0 Determine the appropriate TS ●●●● The selection of test statistics is related with many factors, such as the type of variable, research aims and conditions proffered by the sample 21/1/29
2021/1/29 15 The selection of test statistics is related with many factors, such as the type of variable, research aims and conditions proffered by the sample. Determine the appropriate T.S