Suppose you want to test the claim that the mean length of process time has decreased from 12.3 minutes. Your sample data leads you to fail to reject H0. The actual mean length is 12.0 minutes. What type of error, if any, have you made?
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the type of error is when we reject the null hypothesis when it is true . for example - we have a medicine manufactured and each pill is supposed to have 14 milligrams of the active ingredient
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