In: Statistics and Probability
Run a linear regression using Excel’s Data Analysis regression tool. Construct the linear regression equation and determine the predicted total sales value if the number of promotions is 6. Is there a significant relationship? Clearly explain your reasoning using the regression results.
| Number of Promotions | Total Sales |
| 3 | 2554 |
| 2 | 1746 |
| 11 | 2755 |
| 14 | 1935 |
| 15 | 2461 |
| 4 | 2727 |
| 5 | 2231 |
| 14 | 2791 |
| 12 | 2557 |
| 4 | 1897 |
| 2 | 2022 |
| 7 | 2673 |
| 11 | 2947 |
| 11 | 1573 |
| 14 | 2980 |