Final answer:
A prediction error occurs when there is an unexpected outcome. Predictions can be wrong due to factors like bad data or individuals not behaving as expected.
Step-by-step explanation:
A prediction error occurs when there is an outcome that is not expected. Predictions might be wrong due to various factors such as bad data or individuals not acting as expected. For example, just like how weather forecasts can be wrong due to complex meteorological relationships, behavior predictions can also be incorrect. It should be noted that predictions are not always correct, so there is always a possibility of a prediction error.