In recent years, the most difficult part of public relations work has shifted from retaining clients to attracting clients

The local library surveys its patrons to determine what kinds of new books to purchase and finds that people are less interested in reading books and more interested in watching movies

So, the library decides to dedicate a large portion of its new-acquisitions fund to movies on DVDs. What kind of system does this library represent? A. Relatively open system D. Relatively reactive system B. Relatively closed system E. Relatively cybernetic system C. Relatively illiterate system

Which of the following is an assumption of the regression model?

A) The errors are independent. B) The errors are not normally distributed. C) The errors have a standard deviation of zero. D) The errors have an irregular variance. E) The errors follow a cone pattern.