SPSSÂ HomeworkÂ 6 Instructions

Prediction:Â Bivariate Linear Regression

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Note:Â The z-scoring method used in theÂ practiceÂ data fileÂ is covered inÂ Lesson 19Â during PSYC 354.

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GreenÂ &Â Salkind:Â Lesson 33,Â Exercises 1, 3â€“4

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The following helpful tips are numbered to correspond with the exercise number to which they refer (a dash indicates that no tips are needed):

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1.

Though the example in the lesson includes creating a zÂ score variable, this step is not necessary for the homework exercises.Â (3 ptsÂ for outputÂ and 3 pts each foraâ€“e)3.

Write the answer to the last part of this question beneath your graph, in sentence form.Â (3Â pts)4.

All homework â€œResults sectionsâ€Â mustÂ follow the example given in the Course Content document â€œWriting Results of Statistical Tests inÂ CurrentÂ APA Formatâ€ (Note: you do not have to refer to a figure).Â Note:Â The statistical statement for a bivariate linear regressionÂ mustÂ include at least the equation of the line and the confidence interval for the slope (the second row under Confidence Intervals in the output).Â (3Â pts)Â

PartÂ 2:

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1.

A community psychologist is interested in whether spending time in after-school programs is predictive of the number of arrests as a young adult in a high-risk neighborhood. After collecting records on 17 individuals overÂ 8Â years, the psychologist compiles the information listed in the table below.Â Conduct a linear regression to analyze the research question.Â

The steps will be the same as the ones you have been practicing in PartÂ 1Â of the assignmentâ€”the only difference is that you are now responsible for creating the data file as well. Remember to name and define your variables under the â€œVariable View,â€ then return to the â€œData Viewâ€ to enter the data.Â (3Â pts)

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Table is shown onÂ theÂ following page.

Hours Spent in After-School Programs |
Number of Arrests After Age 17 |

3 |
2 |

41 |
1 |

68 |
1 |

29 |
0 |

7 |
5 |

12 |
4 |

121 |
0 |

54 |
1 |

19 |
3 |

134 |
0 |

106 |
1 |

67 |
1 |

25 |
3 |

73 |
1 |

38 |
4 |

110 |
0 |

31 |
3 |

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2.

Construct a scatterplot of the relationship between theÂ 2Â variables. Plot the regression line on this graph.Â (3Â pts)Â

3.

Is time spent in after-school programs predictive of the number of arrests as a young adult?Â Write aÂ Results sectionÂ in current APA styleÂ describing the outcome.Â All homework â€œResults sectionsâ€Â mustÂ follow the example given in the Course Content document â€œWriting Results of Statistical Tests inÂ CurrentÂ APA Formatâ€ (Note: you do not have to refer to a figure).Â The statistical statement for a bivariate linear regressionmustÂ include at least the equation of the line and the confidence interval for the slope (the second row under Confidence Intervals in the output).Â (3Â pts)Â

PartÂ 3: Cumulative Homework

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1.

To investigate theÂ relationship between hours spent studying and exam scores, researchers measured the following. Is there a significant relationship between hours spent studying and scores? Choose the correct test to analyze this question, set up the SPSS file, and run the analysis.Â Follow the directions under the tableÂ on the following page.Â Â

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HoursÂ SpentStudying |
Exam Scores |

Â Â Â 1 Â Â Â 3 Â Â Â 3 Â Â Â 4 Â Â Â 4 Â Â Â 5 Â Â Â 5 Â Â Â 5 Â Â Â 6 Â Â Â 6 Â Â Â 7 Â Â Â 7 Â Â Â 8 |
Â Â Â 40 Â Â Â 50 Â Â Â 51 Â Â Â 61 Â Â Â 73 Â Â Â 71 Â Â Â 64 Â Â Â 75 Â Â Â 68 Â Â Â 76 Â Â Â 94 Â Â Â 85 Â Â Â 84 |

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a)

Paste appropriate SPSS output.Â (3Â pts)b)

Paste appropriate SPSS graph.Â (3Â pts)c)

Write aÂ Results sectionÂ in current APA styleÂ describing the outcome.Â All homework â€œResults sectionsâ€Â mustÂ follow the example given in the Course Content document â€œWriting Results of Statistical Tests inÂ CurrentÂ APA Formatâ€ (Note: you do not have to refer to a figure).Â (4Â pts)Â

Submit this assignment by 11:59 p.m. (ET) on Monday of Module/Week 6.

Subject | Science |

Due By (Pacific Time) | 09/29/2014 02:00 pm |

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