Question

*Requires SPSS Output for Graph, Descriptive table, Test of Sphericity, Tests of Within-Subjects Effects, and the appropriate post-hoc tests (pairwise comparisons) using a Bonferroni correction:

Western people can become obsessed with body weight and diets, and because the media are insistent on ramming ridiculous images of muscular celebrities down into our eyes and brainwashing us into believing these bulked of cross-fit types are actually attractive, we all end up terribly depressed that we're not perfect. This gives the evil corporate types the opportunity to jump on our vulnerability by making loads of money on diets that will apparently help us attain the body beautiful. Well not wishing to miss out on this great opportunity to exploit people’s insecurities I came up with my own diet called the “Wallykins diet” (not to be confused with the Atkins diet obviously). The basic principle is that you eat like me: Tons of chicken and rice, one protein shake after another, and cram as many nutritional supplements as you can down your throat on a daily basis. To test the efficacy of my wonderful new diet, I took 10 students who considered themselves’ to be in need in losing weight and getting “ripped”, and put them on this diet for two months. Their weight was measured in kilograms at the start of the diet, and then after one month and two months.

Start |
1 month |
2 months |

66.00 |
62.00 |
62.00 |

65.00 |
63.00 |
62.00 |

68.00 |
65.00 |
71.00 |

108.00 |
100.00 |
94.00 |

69.00 |
66.00 |
66.00 |

103.00 |
102.00 |
101.00 |

73.00 |
63.00 |
61.00 |

74.00 |
71.00 |
60.00 |

85.00 |
73.00 |
65.00 |

79.00 |
65.00 |
62.00 |

- Graph the data.
- Perform the appropriate analysis at an alpha level of .05., and attach the appropriate sections of your SPSS output (Descriptive table, Test of Sphericity, Tests of Within-Subjects Effects)?
- Is the assumption of sphericity violated? If yes use the F ratio produced by the Greenhouse-Geisser correction.
- What is the effect size?
- If your results are significant perform the appropriate post-hoc tests (pairwise comparisons) using a Bonferroni correction to identify where the differences lie. Make sure to include the results of these comparisons in your conclusion. Attach the appropriate sections of your SPSS output (Pairwise Comparisons)?
- Please write out the appropriate conclusion for your results (make sure the conclusion is APA).

Answer #1

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