a CClSlOIl regar- f) What is the estimated effect size using Cohen's d? g) What is the 95% condence interval around the difference population mean? h) Did the intervention have an effect on the outcome? 9) Question #7 and Question #8 presented you with the exact same numerical data described as coming from two different research designs. (6 marks) a) How close were the observed values of the test statistics? Explain. b) How close were the confidence intervals? Explain. c) Did you arrive at the same decision for each test? Explain. 10) Correctional services were interested in further evaluating a cognitive-behavioural based intervention. The same group of researchers randomly assigned 15 offenders into a low intensity, medium intensity, or high intensity intervention program. The researchers then gathered data on the number of violent incidents perpetrated by offenders over the ve years after their release. They were interested in whether the intensity of the intervention program had any effect on the outcome. (6 marks)