Which corner of a ROC curve indicates the best performance?

- upper left
upper left

- upper right
- lower right

What are the axes of a ROC curve?

- TP and FN
- FP and FN
- TP and TN
TP and FP

You are developing a automatic passport system for use by immigration, where pictures of people are compared to those in their passports. Which of the following is the best approach to take?

- maximize the number of true positives
- minimize the number of false negatives
minimize the number of false positives

- maximize the number of true positives, even if the false positive rate is high

What is `ground truth'?

- the true values obtained by an algorithm
data known to be correct

- images of the ground
- values obtained by an algorithm that are known to be true

When evaluating vision systems, it is normal to:

- train on the training set and test using both training and test sets
- train on all data but test on only the test set
- use the same training and test sets
have different training and test sets

Which test is most appropriate for comparing algorithms' performances?

McNemar's test

- Gauss's test
- Canny's test
- Laplace's test

What assumption underlies a null hypothesis test?

- that the algorithms differ in performance
- that the algorithms return a null result
- that the algorithms don't work
that there is no performance difference between algorithms

What do we do if we want to see if algorithms' performances differ?

- Look up the Z-score in binomial tables
- Look up the Z-score in Normal distribution tables
- Look up the Z-score in one-tailed tables
Look up the Z-score in two-tailed tables

What do we do if we want to see if one algorithm's performance is better than another's ?

- Look up the Z-score in binomial tables
- Look up the Z-score in two-tailed tables
Look up the Z-score in one-tailed tables

- Look up the Z-score in Normal distribution tables

What is a false negative?

- A negative result that is false
- A false result from an algorithm
A false result from an algorithm that should have succeeded

- A false result from an algorithm that should be negative