5 7 points 5. [7 pt.] A corporation randomly selects 150 salespeople and finds that 66% who have never taken a self-improvement course would like such a course. The firm did a similar study 10 years ago in which 60% of a random sample of 160 salespeople wanted a self-improvement course. The groups are assumed to be independent random samples. Let 71 and 72 represent the true proportion of workers who would like to attend a self-improvement course in the recent study and the past study, respectively. At the 0.10 level of significance, is there evidence that the proportion of salespeople who would like to attend a self-improvement course has changed from the past study? Answer based on the critical value approach. Show the work: a) your hypotheses, b) test statistic, c) critical value, and d) decision. Critical values, where P (Z > Za) = a and P (t > ta,df ) = a Zo.10=1.282 Zo.05=1.645 Zo.025 =1.960 to.10,309 = 1.284 to.05,309 = 1.650 to.025,309 = 1.968 x x E 12pt Paragraph 6 2 points 6.1) [2 pt.] Multiple regression is called "multiple" because it has several data points