Below are four alternative hypotheses, values of zobs, and p values. Assuming a significance level of .05, which of these is true?
a. H1: ?1–?0 > 0, zobs = –1.8, p < .05
b. H1: ?1–?0 > 0, zobs = 1.8, p > .05
c. H1: ?1–?0 < 0, zobs = –2.0, p < .05
d. H1: ?1–?0 < 0, zobs = –2.0, p > .05
Ans: C
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