In: Statistics and Probability
The monthly value of sales for the first 3 years of a restaurant’s operation is shown below (values are in 1,000 USD).
Use a multiple linear regression model with dummy variables to develop an equation to account for seasonal effect in the data. (data below) ---- SHOW IN EXCEL
| Month | Sales |
| 1 | 242 |
| 2 | 235 |
| 3 | 232 |
| 4 | 178 |
| 5 | 184 |
| 6 | 140 |
| 7 | 145 |
| 8 | 152 |
| 9 | 110 |
| 10 | 130 |
| 11 | 152 |
| 12 | 206 |
| 13 | 263 |
| 14 | 238 |
| 15 | 247 |
| 16 | 193 |
| 17 | 193 |
| 18 | 149 |
| 19 | 157 |
| 20 | 161 |
| 21 | 122 |
| 22 | 130 |
| 23 | 167 |
| 24 | 230 |
| 25 | 282 |
| 26 | 255 |
| 27 | 265 |
| 28 | 205 |
| 29 | 210 |
| 30 | 160 |
| 31 | 166 |
| 32 | 174 |
| 33 | 126 |
| 34 | 148 |
| 35 | 173 |