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QMP Unit 2

null hypothesis no difference, no effect, distracts from the real hypothesis, a non-hypothesis
Alpha(type 1 error)(p) reject a true null hypoth.
beta (type 2 error) keep a false null hypoth.
alpha the probability at which you are willing to say that something is not just due to chance, .05 or .01, p
steps for a one sample t-test 1-set alpha level 2-state null hypoth. 3-state alternate hypoth. 4-find t computed 5-find t critical 6-make conclusion to reject or fail to reject null hypoth. 7-put it in English!