●●● ●●●● ●●●●● ●●●● ●●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 21/1/292021/1/29 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