Psychology > QUESTIONS & ANSWERS > PSY 520 Topic 3 Exercise Chapter 7 and 8-Latest Update (All)
PSY 520 Topic 3 Exercise Chapter 7 and 8-Latest Update
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PSY-520 Topic 3 Exercises - Chapter 6 & 7 Jones-2018 Chapter 6 & 7 (6.7, 6.10, 6.11, 7.8, 7.10, 7.13) 6.7 a. Estimate whether the following pairs of scores for X and Y reflect a positive, negative... , or no relationship X Y 64 66 40 79 30 98 71 65 55 76 31 83 61 68 42 80 57 72 These pairs reflect a slight negative relationship b. Construct a scatterplot for X and Y. Verify that the scatterplot does not describe a pronounced curvilinear trend. 25 30 35 40 45 50 55 60 65 70 75 0 20 40 60 80 100 120 f(x) = - 0.64x + 108.35 R² = 0.84 X Y c. Calculate r using the computation formula. r=SPxy/(SSx*SSy)(^1/2) This study source was downloaded by 100000831988016 from CourseHero.com on 05-02-2022 07:33:52 GMT -05:00 https://www.coursehero.com/file/31261584/PSY-520-Topic-3-Exercises-Chapter-6-7docx/ SPxy=X*Y-(X*Y)/n =33,304-(451*687)/9 =33,304-309,837/9 =33,304-34,426.33 SPxy=-1,122.33 SSx=X^2-(X)^2/n =24,357-(451)^2/9 =24,357-203,401/9 SSx=1,756.89 SSy=Y^2-(Y)^2/n =53,299-(687)^2/9 =53,299-52,441 SSy=858 r=-1,122.33/(1,756.89*858)^ [Show More]
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