You have been told that the average height of Psy 1001 students is 5'7". But the only Psy 1001 student you know personally is Alan who is 6'5" tall. Thus you assume the average height of Psy 1001 students must be wrong. What lesson from statistics have you failed to remember?

a. Be careful making inferences about individuals based on their group membership.
b. You can't make inferences about groups based on an individual observation.
c. "birds of a feather flock together"
d. "correlation does not equal causation"

Answer: b. You can't make inferences about groups based on an individual observation.