A list contains labels and scores of five different performance levels. All scores were randomly generated.

data(IB500)

A list with 8 items.

- np
number of positives: 500

- nn
number of negatives: 5000

- labels
labels of observed data

- random_scores
scores of a random performance level

- poor_er_scores
scores of a poor early retrieval level

- good_er_scores
scores of a good early retrieval level

- excel_scores
scores of an excellent level

- perf_scores
scores of the perfect level