# Homework Chapter 10

**Assignment:**

*Objective: Review concept Correlation and Causation*

- The two major requirements for causal conclusions from an experimental design are ______________.

*Objective: Apply concepts Correlation, Causation*

- If a strong positive correlation between the viewing of violent films and antisocial behaviour were observed, many might assume that viewing violent films causes antisocial behaviour. This would be a faulty assumption because ______________.

*Objective: Apply technique Correlation *

- A researcher seeks to replicate a study that found a significant positive relationship between womenâ€™s symptoms of obsessive-compulsive disorder and their core beliefs regarding the importance of holding unrelenting standards. The data collected are shown below. Using a scatter plot, examine the strength and direction of the relationship between the two variables. The relationship appears to be ______________.

Client |
OCD (X) |
Beliefs (Y) |

1 |
4.08 | 7.20 |

2 |
4.43 | 3.69 |

3 |
6.56 | 7.27 |

4 |
1.72 | 3.62 |

5 |
3.79 | 2.83 |

6 |
1.51 | 4.71 |

7 |
4.32 | 0.64 |

8 |
6.16 | 7.62 |

9 |
5.65 | 0.22 |

10 |
2.61 | 5.08 |

11 |
3.97 | 0.42 |

12 |
2.79 | 3.36 |

13 |
1.36 | 1.61 |

14 |
1.71 | 3.15 |

15 |
3.10 | 3.25 |

16 |
3.26 | 4.45 |

17 |
3.40 | 4.11 |

18 |
0.81 | 4.32 |

19 |
1.63 | 0.20 |

20 |
4.03 | 1.98 |

21 |
3.24 | 5.16 |

22 |
2.00 | 6.67 |

23 |
3.92 | 0.82 |

24 |
7.03 | 3.09 |

25 |
0.95 | 0.52 |

26 |
0.29 | 3.14 |

- For the research scenario described in problem 3, for a hypothesis test on correlation, assume the Populations are defined as follows. Population 1: Women like those in this study; Population 2: Women for whom there is no (positive) relationship between the two variables. The hypotheses should be defined as ______________.
- For the research scenario described in problem 3, the characteristics of the comparison distribution should be defined as ______________.
- For the research scenario described in problem 3, assuming a significance level of .01, the cutoff t score should be ______________.
- For the research scenario described in problem 3, the calculated t-test result should be ______________.
- For the research scenario described in problem 3, the hypothesis test decision should be ______________.
- For the research scenario described in problem 3, the p-value associated with the t-test result is _____________.
- For the research scenario described in problem 3, the conclusion as written in a published results section could be ______________.

*Objective: Apply technique Regression *

- For the research scenario described in problem 3, the slope of the best fit regression line would be ______________.
- For the research scenario described in problem 3, the intercept of the best fit regression line would be ______________.

*Objective: Apply concepts Prediction*

- For the research scenario described in problem 3, the predicted core beliefs score for a woman with the OCD symptom score of 3.70 would be ______________.
- The accuracy of predictions made from the regression model from the data in the research scenario described in problem 3 would be ______________.