Posted by Akhtar on Wednesday, May 4, 2011 at 7:36am.
Hello,
If mean is say 33 seconds and standard deviation under root of 10.45 then prob of less than 18 seconds results in Z = 4, but the tables for norm distribution don't have 4 in them.. how to get round this problem?

probability  PsyDAG, Wednesday, May 4, 2011 at 1:49pm
P < .0001
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