# ✅ Quiz M7.05¶

Question

What is the default score in scikit-learn when using a regressor?

• a) $$R^2$$

• b) mean absolute error

• c) median absolute error

Question

When errors are used in the function cross_validate in scikit-learn, one should:

• a) pass a callable that reverse the sign of the error

• b) create a scorer using make_scorer and pass the parameter greater_is_better=False

• c) pass a string with the name of the metric which should start with the prefix neg_