#### Quiz 3

##### Use the following data for this quiz

Age in months |
Actual pounds |

0 |
6.7 |

2 |
7.5 |

4 |
11.5 |

6 |
13.5 |

8.5 |
15.5 |

12 |
20 |

18 |
19.4 |

28 |
23 |

- _______ Calculate the slope of the best fit (also known at least squares) line for the data.
- _______ Calculate the y-intercept of the best fit line.
- ______________ What does the y-intercept represent physically in this model?
- ______________ Is the correlation positive, negative, or neutral?
- _______ What is Marlin's predicted weight at 23 months?
- _______ What is Marlin's predicted weight at 480 months?
- _______ What is the predicted age in months at which Marlin weighed 18 pounds?
- _______ What is the predicted age in months at which Marlin will weigh 180 pounds?
- _______ Calculate the linear correlation coefficient r for the data.
- ______________ Is the correlation none, low, moderate, high, or perfect?
- _______ Calculate the coefficient of determination.
- _______ What percent of the variation in age in months conception explains the variation weight?
- ______________ What do you think happened to Marlin between the 12
^{th} and 18^{th} month?

Lee Ling home

COM-FSM home page