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Ravi ★ India, 2008-06-02 12:39 (5976 d 17:12 ago) Posting: # 1897 Views: 7,990 |
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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. Ravi — Thanks & Regards Ravi Pandey |
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Ohlbe ★★★ France, 2008-06-02 13:57 (5976 d 15:54 ago) @ Ravi Posting: # 1898 Views: 6,297 |
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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. Regards Ohlbe |
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martin ★★ Austria, 2008-06-04 00:40 (5975 d 05:11 ago) @ Ravi Posting: # 1904 Views: 6,353 |
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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 martin |
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Helmut ★★★   Vienna, Austria, 2008-06-05 02:25 (5974 d 03:26 ago) @ martin Posting: # 1920 Views: 6,420 |
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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... — Dif-tor heh smusma 🖖🏼 Довге життя Україна! ![[image]](https://static.bebac.at/pics/Blue_and_yellow_ribbon_UA.png) Helmut Schütz ![[image]](https://static.bebac.at/img/CC by.png) The quality of responses received is directly proportional to the quality of the question asked. 🚮 Science Quotes |
Ing. Helmut Schütz