2008-06-02 12:39
(5660 d 08:40 ago)

Posting: # 1897
Views: 7,278

 Type 3 sum of square [General Sta­tis­tics]

Dear all,
My question is what is the basic difference between Type 1, 2 and 3 sum of square. Please reply as soon as possible.

Thanks & Regards
Ravi Pandey

2008-06-02 13:57
(5660 d 07:22 ago)

@ Ravi
Posting: # 1898
Views: 5,749

 Type 3 sum of square

Dear Ravi,

❝ Please reply as soon as possible.

If you are in such a hurry, why didn't you use the search function of the forum in the first place ?

You would have found this thread, for instance.


2008-06-04 00:40
(5658 d 20:39 ago)

@ Ravi
Posting: # 1904
Views: 5,808

 Type 3 sum of square

dear ravi !

there is often a misunderstanding regarding sum of squares. there is in fact only one sum of squares, the improvement of the sum of squares for the alternative hypothesis over the sum of squares for the null hypothesis. With a tool like R (www.R-project.org) you simple fit model1 then fit model2 and compare fits using anova(model1, model2).

Refer to http://www.matthewckeller.com/TypeIorTypeIIISS.pdf for more details.

best regards

Vienna, Austria,
2008-06-05 02:25
(5657 d 18:54 ago)

@ martin
Posting: # 1920
Views: 5,883

 Type 3 sum of square

Dear Martin,

thanx for the link - which lead me to a quite interesting paper by Bill Venables from 2000.
I like the quote on page 12: [...] SAS seems to be to statistical computing what Microsoft is to personal computing [...]
The Type III stuff starts at page 13...

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