作者dinotwo (呼呼)
看板Statistics
標題Re: [問題] Type I SS and Type II SS
時間Tue May 22 00:59:51 2007
我也正在找
在網路上看到如下
Type I SS and Type II SS measure the contribution of a variable to the
reduction in SSE. Type I SS measure the reduction in SSE as that variable is
entered into the model in sequence. Type II SS are the increment in SSE that
results from removing the variable from the full model. Type II SS are
equivalent to the Type III and Type IV SS reported in the GLM procedure. If
Type II SS are used in the numerator of an F test, the test is equivalent to
the t test for the hypothesis that the parameter is zero. In polynomial
models, Type I SS measure the contribution of each polynomial term after it
is orthogonalized to the previous terms in the model. The four types of SS
are described in Chapter 11, "The Four Types of Estimable Functions."
※ 引述《airflyer (airflyer)》之銘言:
: 請問
: 何謂Type II SS
: 何謂Type II SS
: 能否舉例說明? 感謝高手.
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◆ From: 140.109.226.252
1F:推 kingbee:還有type III SS type IV SS 05/23 15:44
2F:→ kingbee:和變數使用的先後有關 05/23 15:45