Various terms in the field of Statistical Inference and their presentation in secondary school text books are examined. A comparison of these terms in secondary school textbooks is carried out against their meanings in everyday use as well as in the mathematical context from two standard university textbooks from the field. We offer evidence that the meanings are not necessarily the same and that in some cases the definition which appears in the secondary school textbook is closer to its everyday use than to its mathematical one. Some implications for school textbook writers are derived.
