Hypothesis Testing Using Z-Scores
nHypothesis testing Ð tests relationship between X and m
1.results are descriptive of X to m
2.3 possible alternative hypotheses (H1)
nX =  m0
nX <  m0
nX >  m0
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nH0:     X = m0 
nH1:     X ¹ m0  Always assume H0 is true
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nIn Research Ð we want to reject H0 Ð this indicates our          X  is different from m0