Understanding Decision Trees Quiz

How does the search across different predictors proceed?

• It is a one-time process.

• It is iterative, adding one predictor at a time.

• It adds all predictors at once.

• It removes predictors one by one.

What is the basic intuition behind the Decision tree?

• To map out all possible decision paths in the form of a tree.

• To create a linear model.

• To ignore decision paths.

• To use only one decision path.

What does the algorithm do given the target field?

• It searches across all other data fields and adds them to the model.

• It ignores other data fields.

• It removes the target field.

• It uses only the target field.

What does decision tree training often involve in terms of time?

• A) Less time

• B) More time

• C) No time

• D) Immediate training

Why is decision tree training relatively expensive?

• A) Because it is simple

• B) Because it is quick

• C) Because the complexity and time taken are more

• D) Because it requires no resources

Which patient has high blood pressure and is middle-aged?

• p3

• p7

• p12

• p13

What type of classifiers are used in the sample for building a decision tree?

• Multiclass classifiers

• Binary classifiers

• Regression classifiers

• Clustering classifiers

What is entropy in the context of decision trees?

• A measure of the number of nodes

• A measure of the impurity or uncertainty in a group of observations

• A measure of the depth of the tree

• A measure of the number of branches

How many patients are male in the given dataset?

• 5

• 6

• 7

• 8

What is the Gini index in the context of decision trees?

• A measure of the number of leaves

• A measure of the impurity or diversity in a group of observations

• A measure of the height of the tree

• A measure of the number of splits