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 12th and 18th month?
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