MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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The Quick Sell car dealership has been using 1-minute spot ads on a local TV station. The ads always occur during the evening hours and advertise the different models and price
| x | y |
| 6 | 15 |
| 20 | 31 |
| 0 | 10 |
| 14 | 16 |
| 25 | 28 |
| 16 | 20 |
| 28 | 40 |
| 18 | 25 |
| 10 | 12 |
| 8 | 15 |
- Draw a
scatter diagram for the data ( You can copy and past this graph in your work area by using any technology). Do you see a linear relation? - Compute the value of linear
correlation coefficient "r". From the value of "r" can we decide the strength of the relation ( strong, moderate, or weak)? - Find the equation of regression line, identify the slope and intercept. Also explain meaning of slope in the context of the problem.
- How many cars can the manager expect to sell if 12 ads per week are aired on TV?
- The regression equation obtained above is good predictor or otherwise?
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