Suppose the ages of students in statistics 101 follow a right skewed distribution with a mean of 23 years and a standard deviation of 3 years. if we randomly sampled 100 students, which of the following statements about the sampling distribution of the sample mean age is incorrect?

Positive and negative reinforcement indeed serve to strengthen wanted behavior. The difference is that with positive reinforcement you're trying to positively influence and change a certain type of behavior while with negative reinforcement you're trying to extinguish a certain pattern of behavior which isn't desired.