MandysNotes

Friday, 22 January 2010 19:35

What is the Mean?

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 So...while I was cruising the net for more learning resources, I found this on a Wiki which defined the MEAN as:

 

Yeeeeah.  In a technical sense, this is correct, but if I saw it in a book without knowing what the squigglies were, I would most certainly freak out. 

 

THIS is exactly the same thing, and a whole lot easier to conceptualize:

 

If you are given 3 numbers, add them up and divide by 3:

 

 

If you are given 4 numbers, add them up and divide by 4:

 

And so on.  The MEAN is the TOTAL SUM of all values you are given, divided by the NUMBER of values you are given. 

 

So this:

Technically means: 1 times the SUM of all the values you are given, divided by the number of values you are given.  (Somehow it's easier to think about in English.  Check out What's with the Greek? later.)

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