●●● ●●●● ●●●●● contents ●●●● ●●0●● ●●●● ●●●● 1 introduction 2. Hypothesis testing 2. 1 One sample t test 2.2 two independent-samples t test 2.3 Paired-samples t test 21/1/292021/1/29 2 contents 1. introduction 2. Hypothesis testing 2.1 One sample t test 2.2 two independent-samples t test 2.3 Paired-samples t test