Question 1

Which of the following is an example of clustering?


Question 2

Which of the following are advantages to using decision trees over other models? (Select all that apply)


Question 3

What is the main reason that each tree of a random forest only looks at a random subset of the features when building each node?


Question 4

Which of the following supervised machine learning methods are greatly affected by feature scaling? (Select all that apply)


Question 5

Select which of the following statements are true.


Question 6

Match each of the prediction probabilities decision boundaries visualized below with the model that created them.


Question 7

A decision tree of depth 2 is visualized below. Using the `value` attribute of each leaf, find the accuracy score for the tree of depth 2 and the accuracy score for a tree of depth 1.

What is the improvement in accuracy between the model of depth 1 and the model of depth 2? (i.e. accuracy2 - accuracy1)


Question 8

For the autograded assignment in this module, you will create a classifier to predict whether a given blight ticket will be paid on time (See the module 4 assignment notebook for a more detailed description). Which of the following features should be removed from the training of the model to prevent data leakage? (Select all that apply)


Question 9

Which of the following might be good ways to help prevent a data leakage situation?


Question 10

Given the neural network below, find the correct outputs for the given values of x1 and x2.

The neurons that are shaded have an activation threshold, e.g. the neuron with >1? will be activated and output 1 if the input is greater than 1 and will output 0 otherwise.