Nursing Students General Students
Published Dec 26, 2007
GingerSue
1,842 Posts
this is a question about analyzing data - measures of variability - specifically "variance" - it means dispersion and is equal to the square of the standard deviation
what is "equal to the square of the standard deviation" - is it saying the square root of SD, or is it saying SD squared?
a little more clearly than "dispersion" - what does variance really mean?
thanks
mshultz
250 Posts
this is a question about analyzing data - measures of variability - specifically "variance" - it means dispersion and is equal to the square of the standard deviationwhat is "equal to the square of the standard deviation" - is it saying the square root of SD, or is it saying SD squared?a little more clearly than "dispersion" - what does variance really mean?thanks
Here is an understandable explanation:
http://www.mathsisfun.com/standard-deviation.html
Equal to the square of the standard deviation means:
standard deviation times standard deviation equals variance
or
the square root of variance equals standard deviation
Here is an understandable explanation:http://www.mathsisfun.com/standard-deviation.htmlEqual to the square of the standard deviation means:standard deviation times standard deviation equals varianceorthe square root of variance equals standard deviation
thanks,
this is going to take a bit more time to figure out:
"The Variance (which is the square of the standard deviation, ie: σ2)"
But my book says that standard deviation is SD, not the symbol above - give this a bit of time for me to sort through