Use the Following to Answer the Questions Below

Essay

Use the following to answer the questions below:
The Admissions Office at a small university has developed a new 10-minute video about the university to send to prospective students. Before mass-producing the DVD, they would like to test whether it is more effective than the current video. Suppose that you have 12 high school student volunteers who have agreed to take part in an experiment. The explanatory variable to be studied is the type of video, with two levels OLD and NEW.
-Explain what it means, in the context of this study, to want the subjects to be "blind."