Some people choose a platform based on its ____, or "look and feel".?

In Outlook Express, the ________ displays folder icons, which are also displayed in the Folders pane

A) Status bar B) Menu bar C) Outlook bar D) Views bar

Suppose two-thirds of the data belong to the positive class and the remaining one-third belong to the negative class. What is the expected error of a classifier that predicts every test record to be positive?

Consider the task of building a classifier from random data, where the at- tribute values are generated randomly irrespective of the class labels. Assume the data set contains records from two classes, “+” and “?.” Half of the data set is used for training while the remaining half is used for testing.