3. You have a hypothesis that drivers today are less likely to have an automobile accidents because people are driving less because of the pandemic. You nd data from a national study 20 years ago indicating that there were 6.88 accidents per 100,000 hours driven on average. You examine data from 10 cities from across Canada and nd that the rate among them is just 4.75 (SD = 1.75)? What is the appropriate hypothesis test (tell us why by answering the questions in the diamonds from the ow chart at the end of chapter 18)? Would you do a 1-tail or 2-tail test? WHY? 4. You are interested in implementing a workshop to help students deal with exam anxiety, but this can be costly as a registered mental health professional is required to lead the workshop. Thus, you decide to test the effectiveness of the intervention on a smaller number of students. You ask nine students to complete an anxiety questionnaire (scored from 0-100; higher scores indicate greater anxiety) before and after the workshop. The data are shown below. a) Was this intervention helpal? Would you implement it on a larger scale? b) What is the effect size? 0 Are on more concerned about Type I or Type II error? I IE- . 7 no a.) N \\O h 00 1577 63673. 9444 - - - - - - - - - Variance m on F" E .p. b.) so Ch 4:. a\" loo 0: o. an as N \\D N G on D J3. - q a q EEHEEEHEHEG ON - O\\ N IIHIHIIIHII 444