Question

Why could the mean of the data set below be misleading? ages of teachers: 29, 38, 39, 26, 29, 29, 39, 77, 38, 29

Answer 1

Hindsight BiasThe tendency to believe, after learning an outcome, that one would have foreseen it.
Page: 20Critical ThinkingThinking that does not blindly accept arguments and conclusions. Rather, it examines assumptions, discerns hidden values, evaluates evidence, and assesses conclusions.
Page: 24TheoryAn explanation using an integrated set of principles that organizes observations and predicts behaviors or events.
Page: 25HypothesisA testable prediction, often implied by a theory.
Page: 25Operational DefinitionA statement of the procedures (operations) used to define research variables. For example, human intelligence may be operationally defined as what an intelligence test measures.
Page: 26ReplicationRepeating the essence of a research study, usually with different participants in different situations, to see whether the basic finding extends to other participants and circumstances.
Page: 26Case StudyAn observation technique in which one person is studied in depth in the hope of revealing universal 

Answer 2

The mean of the problem is 37.3. All you need to do is add all the numbers together and then divide them by the amount of numbers. So I added them all and divided by 10.