Calculating RMSE
The following data has been loaded in the DataFrame predictions.
Either manually, or using the Python console, calculate what the root mean square error (RMSE) of these predictions is.
| Predicted | Actual |
|---|---|
| 3 | 4 |
| 2 | 1 |
| 5 | 3 |
This exercise is part of the course
Building Recommendation Engines in Python
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