Friday, April 20, 2007

Standard Deviation And PMCC

A reminder of how to do standard deviation
(click the thumbnails to enlarge)

And how to do Product Moment Correlation Coefficient



At April 21, 2007 9:04 am, Blogger rach.b. said...

Hi would it be possible 4 me to use stem and leaf in my coursework?? Also i've looked at the PMCC but confused would my SAts levels be the X or the Y.
Or is the frequency X.???? Thanks Rachel.B.

At April 21, 2007 4:20 pm, Blogger Mr Allan said...

Hi Rachel,
From what I remember of your coursework, you cant use stem and leaf diags because you have your data in groups rather than the original numbers for wages
but you could use it to display number of pets and sats levels as well as the original numbers

Also yes you can do PMCC,
pets would be X, Sats would be Y
that would find out if the amount of pets is correlated with Sats score

does that make sense?
hope so

reply if not

Mr A


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