Turn on suggestions

Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.

Showing results for

- Home
- /
- Analytics
- /
- Stat Procs
- /
- Type 3 Analysis of Effect in Logistic Regression

Options

- RSS Feed
- Mark Topic as New
- Mark Topic as Read
- Float this Topic for Current User
- Bookmark
- Subscribe
- Mute
- Printer Friendly Page

🔒 This topic is **solved** and **locked**.
Need further help from the community? Please
sign in and ask a **new** question.

- Mark as New
- Bookmark
- Subscribe
- Mute
- RSS Feed
- Permalink
- Report Inappropriate Content

Posted 11-10-2019 10:30 PM
(9659 views)

In Logistic Regression, the Type 3 Analysis tests are performed to test the statistical significance of each input. What exactly is the statistical test?

- Tags:
- logistic regression

1 ACCEPTED SOLUTION

Accepted Solutions

- Mark as New
- Bookmark
- Subscribe
- Mute
- RSS Feed
- Permalink
- Report Inappropriate Content

6 REPLIES 6

- Mark as New
- Bookmark
- Subscribe
- Mute
- RSS Feed
- Permalink
- Report Inappropriate Content

I don't understand your question. Do you mean pick up the most significant variables ?

```
proc logistic data=sashelp.class;
model sex=age weight height/selection=stepwise;
run;
```

- Mark as New
- Bookmark
- Subscribe
- Mute
- RSS Feed
- Permalink
- Report Inappropriate Content

@MLAC wrote:

In layman's terms, Type III tests are what you would use if there is no particular ordering of the predictor variables, each is considered to be entered into the model last, to see if it adds any predictive value. (I think) PROC LOGISTIC only uses Type III anyway, the other types of tests are for PROC GLM and similar procedures, and it is called Type III in PROC LOGISTIC just to keep the naming consistent with other modeling procedures. (A case where you would have a definite ordering is a polynomial model, where linear term is entered first, and quadratic term is entered second, and so on, in which case you would use Type II test; but you don't mention anything like this, so Type III is appropriate)

--

Paige Miller

Paige Miller

- Mark as New
- Bookmark
- Subscribe
- Mute
- RSS Feed
- Permalink
- Report Inappropriate Content

Is the type lll test Chi-Square Association test on each input?

- Mark as New
- Bookmark
- Subscribe
- Mute
- RSS Feed
- Permalink
- Report Inappropriate Content

The specific output table you want says "Type 3" (or maybe "Type III") in the header above the table.

--

Paige Miller

Paige Miller

- Mark as New
- Bookmark
- Subscribe
- Mute
- RSS Feed
- Permalink
- Report Inappropriate Content

- Mark as New
- Bookmark
- Subscribe
- Mute
- RSS Feed
- Permalink
- Report Inappropriate Content

Thanks. I was wondering if it is Wald Chi-Square test. Thanks for the confirmation.

**Available on demand!**

Missed SAS Innovate Las Vegas? Watch all the action for free! View the keynotes, general sessions and 22 breakouts on demand.

What is ANOVA?

ANOVA, or Analysis Of Variance, is used to compare the averages or means of two or more populations to better understand how they differ. Watch this tutorial for more.

Find more tutorials on the SAS Users YouTube channel.