We run 9 subjects through our treatment program and then givethem the GR-R (? = 30; ? = 3). They get a mean GR-R score of31.5
a) What z score is going to be our cutoff point for this nullhypothesis? (+1.64, +/-2.33, +/-1.96, -1.64).
b) What if we failed to reject the null hypothesis, but I toldyou that your catharsis treatment really did increase aggressionand that in reality the null hypothesis is false. What type ofoutcome occurred? (Type 1 Error, Type 2 Error, Power, CorrectDecision)
c)What if we rejected the null hypothesis, but I told you thatin reality there was no effect of your catharsis treatment? (Type 1Error, Type 2 Error, Power, Correct Decision).
d) What if we repeated the same experiment with 100 people?This time our sample's mean was 31. (we're still using the samepopulation parameters, etc from the previous GR-R questions, but wehave a different sample this time.) What is the standard error ofour comparison distributuion? (.3, 1, 3, none of these answers areclose)
e)Based on the results of this study we should: reject thenull hypothesis or fail to reject the null hypothesis
f) What best explains why pur result was not significant thefirst time but it was the secon time?
We increased n so we increased the power to detect adifference between the sample and the comparisondistribution.
We increased n so we increased the amount of variability inour comparison distribution.
We increased n so we decreased the mean of our sampledistribution.
