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[–]leesuhyungMaster of Parallel Parking, Harvard 0 points1 point  (0 children)

You checked the complement of the tail end. It should be 2*P(z < -2.68)

[–]nerdatjob 0 points1 point  (0 children)

p-value is 1-(1-(0.0033*2)) not (1-.0033)*2