Preview File Edit View Go Tools Window Help 03 7 100% 27 Fri 2:28 PM QE Exam-I-Fall21 (1).pdf (page 4 of 5) ~ practice set 102 (page 2 of 2) ~ Q. Search Aal 2/ J B |= D DV Av practice set 102 Question #5: One of the most common findings in criminology is that girls commit fewer delinquent acts than boys. Suppose that the number of minor delinquent acts in the entire population of juveniles is normally distributed with mean 5.25 and a standard deviation of 12.50. You draw a random sample of 150 girls, and find that the mean number of delinquent acts is 3.35. stats.wor a Using a=.05, test the hypothesis that girls offend at a different rate than the general Dobulation b. Construct a 99.9% confidence interval around this point estimate. C. Compare your results from the hypothesis test and confidence interval. Do you arrive at the same answer using both techniques? Why do you suppose this is so? Question #6: Nationwide, the average number of offenses by juveniles after their release from training school is 4.06. In a sample of 30 juveniles released from a boot camp, the average number of offenses was 6.21, with a standard deviation of 3.57. Using a=0.10, test the hypothesis that boot camps reduce recidivism. Using @=0.01, test the hypothesis that boot camp you recidivate at a different rate than the general population of juveniles. Construct a 99% confidence interval around the point estimate (i.e., sample mean). Compare your results from the hypothesis test and confidence interval. Do you arrive at the same answer using both techniques? Why do you suppose this is so? 2 +