report. Rather they should limit their reports to presentations of the facts and should let
the reader draw his or her own inferences from this presentation.
c. If a report is to be read by one familiar with the research topic, an introduction is
unnecessary.
d. As a general rule, the research report with a wide distribution will require a more
extensive introduction than a report for a narrow audience since a major purpose of the
introduction is to provide the background information the reader needs to appreciate the
discussion in the body of the report.
e. In general, the amount of detail contained in the research report should be inversely
proportional to the amount of direct control the user can exercise over the areas under
discussion.
Which of the following is NOT an assumption made about the error term in least
squares regression?
a. The mean or average value of the error term is zero.
b. The variance of the error term is constant across levels of the predictor variable.
c. The values of the error term are independent of the predictor variable.
d. The values of the error term are independent of one another.
e. All of the above are necessary assumptions underlying the least squares solution.