Statistics homework attached Document Preview: PART 2: ProblemsAnswer the questions in Part 2. Be sure to show every step of your work clearly and completely. Explainyour conclusions in clear...

PART 2: Problems Answer the questions in Part 2. Be sure to show every step of your work clearly and completely. Explain your conclusions in clear language for someone who is not statistically numerate. 2.1 Treat LIKE as an ordinal variable and examine its relation to GPA. A. Which measure of association would you choose and why? B. Calculate that correlation coefficient for n=18 (the first 18 cases). Also calculate the measure of significance. Show all steps in your work. C. Interpret the results and be specific. © Park University SO307 - Page 2 2/18/2008 D. Draw up a scattergram (scatterplot) for this correlation and discuss how it helps you interpret the results. Are there particular cases that throw off the patterns of the results? Explain and justify. CASE # GNDR TRAK ADV LIKE STDY GPA HIGH SCHOOL SENIORS 1 1 1 19 2 5.5 0.55 2 1 1 17 4 5.8 0.63 GNDR = Gender 3 0 1 16 8 3.3 0.67 F = 1 4 0 1 17 6 4.7 0.71 M = 0 5 1 2 14 6 4.2 0.72 TRAK = Course of Study 6 1 1 15 8 6.7 0.76 1 = remedial 7 1 3 11 7 3.8 0.75 2 = vocational 8 0 2 20 7 3.5 0.79 3 = mainstream 9 1 2 12 6 5.7 0.79 4 = college prep 10 0 1 12 7 5.3 0.83 ADV = Home Advantage 11 1 2 7 7 6.3 0.88 ranked index of 12 0 2 7 8 5.1 0.91 resources 13 0 3 7 4 4.4 0.90 for education 14 1 3 6 5 5.6 0.92 LIKE = Attitude Toward Teachers 15 1 3 4 4 6.1 0.95 1 = does not like teachers 16 0 2 4 5 5.7 0.94 10 = likes teachers a lot 17 0 3 7 5 5.1 0.96 STDY = Study time 18 0 3 3 10 6.2 0.98 hours per week 19 1 1 21 3 2.9 0.50 GPA = Average Grades 20 1 4 21 8 4.5 0.50 as percentage 21 0 4 2 10 4.1 0.99 22 0 4 1 10 2.2 1.00 2.2 Examine the association between STDY and GPA. A. Which measure of association would you choose and why? B. Calculate that correlation coefficient for n=20 (the first 20 cases). Also calculate the measure of significance. Show all steps in your work. C. Draw up a scattergram (scatterplot) for this correlation (overlay the slope of the correlation) and discuss how it helps you interpret the results....