Friday, 22 January 2010 19:23

Mean & Standard Deviation

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Disclaimer: I did not create nor do I own these videos. I have simply embedded them, courtesy of YouTube.


Notice this:


The SAMPLE MEAN and the POPULATION MEAN are found using exactly the same formula. 

The ONLY difference between the two is that the SAMPLE MEAN is referred to as "x bar" whereas the POPULATION MEAN is referred to as "mew."  BOTH are found by calculating the SUM of all values you are given and dividing by "N," the number of values you are given. 


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