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