OCR Standard Deviation

 OCR Standard Deviation
Posted: Friday, April 13, 2018 @ 11:27 AM
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Joined: 5 January 2009
Posts: 325

Hi quick question:


Do the students need to be able to know the difference between the sample and population (n or n-1) formulas and when to use them or not?  Just trying to make it as simple as possible.


Thanks 

Posted: Friday, April 13, 2018 @ 11:31 AM
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Joined: 13 January 2009
Posts: 2089

No OCR have said they will accept either/or.

Posted: Friday, April 13, 2018 @ 12:52 PM
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Joined: 5 January 2009
Posts: 325

Brilliant - thanks Deb

They do need to know the difference between variance and SD though ?

Posted: Saturday, April 14, 2018 @ 08:15 AM
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Joined: 13 January 2009
Posts: 2089

I would say so, as they need to know the conditions for using parametric tests e.g normal distribution,interval data and homogeneity of variance.

Posted: Monday, April 16, 2018 @ 09:51 AM
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Joined: 5 January 2009
Posts: 325

Thanks again Debs