The average verbal SAT score for the entire class of incoming college freshmen in the United States is 530.However,if a sample of 20 incoming college freshman is randomly selected from the United...

The average verbal SAT score for the entire class of incoming college freshmen in the United States is 530.However,if a sample of 20 incoming college freshman is randomly selected from the United states,it is likely that this sample's average verbal SAT score will not be exactly 530.This is consistent with the concept of ____.

statistical error

Inferential error

sampling error

descriptive error