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hapter 10 Hypothesis Tests Involving Two Popot Capital punishment law is among the most complex bodies of law in our legal system. As a result, judges make frequent criminal parents are m errors in capital cases in terms of their rulings regarding a than are children with change of venue, the decision to sequester jurors, questions conduct a study on a ran of voir dire, suppression of evidence, and so on. When these confined in a correction errors are made, cases are often won on appeal and have to be 75 nondelinquent youth retried or have a second penalty phase hearing. The Trial Judges youths have at least one Association thinks that only judges who have received special the nondelinquent you training should sit on capital cases because these judges would null hypothesis that the commit fewer errors and there would be fewer cases lost on against the alternative appeal. You decide to test this hypothesis. You take a random has a greater propertic sample of 15 judges who have received extensive training in level of 01 capital punishment law. You match these judges with 15 other 8. It is common wisdom judges who have not received such training but are matched in school leads to deling it more crimes terms of their number of years on the bench, experience as trial (1969) control theory e effect of fines lawyers, gender, and age. You want the two groups of judges to no commitment to edu u take a random be alike in every way except the experience of capital punish those with strong edu een given a fine ment law training. The data on your matched groups of judges strain theory, however ears. You take a are as follows: that dropping out of sc enders recently delinquency because i three years, At Number of Cases Lost on Appeal painful environment u find that 33% between dropping ou d 38% of those have a random sample Judge Untrained Trained . Test the null delinquent offenses t the two groups 1 3 O in the year before dro at they are dif- 3 offenses that each rep N school. Here are those 3 4 Number of Delinquent onducted some A 4 police officers 2 rtments. They Pers rs do not view ed to continue nd male police U V NO A e handling of CO created a scale ic disputes is 10 k." Those who A g of domestic 12 N A be an impor- en taken two 13 officers, and 14 6 3 female police 15 2 1 includes our le officers is core for male Test the null hypothesis that the mean difference in the num- Test the null ber of cases lost on appeal for the two groups of judges is zero qual against against the alternative hypothesis that the untrained judges lose lower than more cases on appeal. Use an alpha level of .01. Test the null hypoth that