1. What are the applications of classification?

Group of answer choices

• Natural language processing
• Spam detection
• Image recognition
• All of the above

2. Decision tree can be applied to multi-class classification.

Group of answer choices

• True
• False

3. It is difficult to interpret decision tree results.

Group of answer choices

• True
• False

4. k-nearest neighbor can be used for classification.

Group of answer choices

• True
• False

5. The logistic regression model essentially returns a value in (0, 1).

Group of answer choices

• True
• False

6. A trained logistic model usually predicts an unknown instance to be 1, if the returned value is greater than 0.5.

Group of answer choices

• True
• False

7. Precision is defined as the fraction of true positives among the retrieved results.

Group of answer choices

• True
• False

8. Recall is the fraction of relevant instances that have been retrieved over the total amount of relevant instances.

Group of answer choices

• True
• False

9. Support vector machine can be effective in high dimensional spaces.

Group of answer choices

• True
• False

10. Support vector machine may need careful parameter tuning to achieve good performance.

Group of answer choices

• True
• False