Have you noticed that Wikipedia can save its pages in PDF format. So I save them and join them to make a nice book. Is that possible to make yours into PDF's?
]]>That's pretty much what I say when I'm introducing this. It's interesting to watch a class would out the mean of the differences and then start scratching their heads. I think that practical drives the lesson home more effectively than anything and it improves their understanding of what a mean actually is.
Bob
]]>Those are all valid reasons. You could add that using the absolute value is harder to algebraically manipulate.
]]>Do you agree with the footnote?
Could it be better explained?
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