Question: how to find the null and alternative hypothesis in spss?
Answer: Write the null and alternative hypotheses first: ... 
Determine if this is a one-tailed or a two-tailed test. ... 
Specify the α level: α = .05.
Determine the appropriate statistical test. ... 
Calculate the t value, or let SPSS do it for you! ... 
Determine if we can reject the null hypothesis or not.