Question: Either calculate the regression coefficient by hand, or perform a linear regression using your spreadsheet software. What is the correlation coefficient? Are the data correlated?
| Month |
Chance of rain
(%) |
Umbrella Sales
(units) |
| January |
22 |
1420 |
| February |
26 |
1380 |
| March |
32 |
1440 |
| april |
41 |
1635 |
| may |
36 |
1744 |
| june |
32 |
1486 |
| july |
28 |
1208 |
| august |
34 |
1145 |
| september |
38 |
1337 |
| october |
44 |
1388 |
| november |
32 |
1456 |
| december |
38 |
1684 |