What percentage of the students in the sample went partying the weekend before the final exam and did well in the exam?

EC businesses generate user profiles in each of the following ways except by

A) asking users to fill in a questionnaire. B) using cookies, spyware, or Web bugs to observe what people are doing online. C) using customer segmentation to identify customers' preferences. D) basing them on what customers have purchased online before.

Which of the following is used to support decision making?

A) data mining B) expert systems C) agent-based modeling D) All of the above