The null hypothesis for Pearson's correlation coefficient states there is an association between the two variables in the population and that the correlation coefficient is one.

Which is an incorrect guideline for modular programming?

A) Keep each module to a manageable size. B) Pay particular attention to the critical interfaces. C) Maximize the number of modules the user needs to modify when making changes. D) Maintain the hierarchical relationships set up in the top-down phases.

Which choice is the BEST example of an interactive medium?

a. An announcement posted on a bulletin board b. A telephone message left on voice mail c. A text message d. A letter