Variance and Standard Deviation Why divide by n1
>> YOUR LINK HERE: ___ http://youtube.com/watch?v=wpY9o_OyxoQ
See all my videos at www.zstatistics.com :) • This video covers a few pesky concepts that are often glossed over. • 0:00 Variance and standard deviation recap • 2:39 Why do we bother with variance at all (ie. why square stuff)? • 6:55 Why do we divide by n-1? • 10:47 What do we mean by degrees of freedom? • Spreadsheet downloadable here: • http://www.zstatistics.com/s/Empirica...
#############################
