A firewall constructs a barrier between an internal network and an intranet

You do not have a "relationship" that links the labels (or levels) for two variables unless the relationship is:

a) causal and consistent. b) consistent and systematic. c) systematic and causal. d) systematic and important.

Which of the following methods is characterized by low levels of control in the data collection process?

A) personal interviews B) telephone interviews C) mail surveys D) focus group