2.2.4 - directional and non-directional tests and hypotheses

Question 1

what is a directional (one-tailed) hypothesis?

Answer 1

one which predicts the direction of difference or relationship that the result is likely to take

Question 2

what is a non-directional (two-tailed) hypothesis?

Answer 2

one which predicts that a difference or relationship will be found, but not the direction the difference or relationship will take