Video player software deals with only one video file format.

To prevent possible problems in creating a dynamic Web site for a database, you should avoid using ________ in the table and field names

A) spaces B) uppercase characters C) underscores D) lowercase characters

Rule accuracy.

Consider a training set that contains 100 positive examples and 400 negative examples. For each of the following candidate rules, R1: A ?? + (covers 4 positive and 1 negative examples), R2: B ?? + (covers 30 positive and 10 negative examples), R3: C ?? + (covers 100 positive and 90 negative examples), determine which is the best and worst candidate rule according to: