The fact that objects that are near each other tend to be grouped together is known as

You need to meet a professor who is very busy, and you are afraid she will refuse to meet you. According to research, the professor will be more willing to meet with you for about 15–20 minutes if you

A) first ask her to spend 2 hours a week with you for the rest of the semester. B) tell her that most of the professors whom you asked were too busy to meet with you. C) employ the principle of scarcity by saying that you are available to meet with her only in the early mornings. D) all of the above

A sample is selected from a population with ? = 46, and a treatment is administered to the sample. After treatment, the sample mean is M = 48 with a sample variance of s2 = 16 . Based on this information, what is the value of Cohen's d?

a. d = 0.125 b. d = 0.25 c. d = 0.50 d. Cohen's d cannot be computed without knowing the sample size.