'1ype 1 errors are otten called because decision may be made, money may be spent, or further research may be prompted when none of these is truly warranted. When H0 is false, an incorrect decision or type 11 error is called a because the effect goes undetected. The probability of a type 11 error is . Whenever the effect is the probability of a correct decision is high and equals . On the other hand, when the effect is and the probability of type 11 error increases. the probability of a correct decision is lower