Exercise

Predictions on new data

Making predictions ultimately comes down to training a model and then using it! In this exercise, you'll make a prediction on new data using the model you created in the last exercise.

Instructions

100 XP

Use the predict() function to estimate the Democrats' vote margin in November if their poll margin today is 7.5 and the Republicans (-1) are the party_in_power.
Find the root-mean-square error of the model, the commonly used measure of a model's error that allows you to calculate a margin of error. You want to take the sqrt() of the mean() of the squared (^2) error of the model's predictions.