Use the Following Information for Questions

Multiple Choice

Use the following information for questions:
A sample of passengers flying on small planes gave a mean total weight (passenger weight including shoes, clothes, and carry-on) of 200 pounds and a standard deviation of 60 pounds.
-Based on Cohen's interpretation, this effect is

A) a small effect, not obvious without statistics.
B) a medium effect, obvious to careful observers.
C) a large effect, obvious to most observers.