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?
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?