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
- /
- Effect cell coding, Problem with the interpretation

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 08-21-2018 05:09 PM
(1524 views)

Using effect cell coding what is the logit of the person having the large wrist watch?

Variable | Parameter estimate | p-value |

Intercept | -0.1310 | 0.4895 |

Medium watch | 0.2130 | 0.3087 |

Small watch | 0.6974 | 0.0047 |

1 ACCEPTED SOLUTION

Accepted Solutions

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

(Large watch) = (Intercept)

6 REPLIES 6

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

Using the reference cell coding, What is the logit for the person with a large wrist watch(Logistic regression model)

Variable | Parameter estimate | p-value |

Intercept | -1.0415 | 0.0283 |

Medium | 1.1234 | 0.0243 |

Small | 1.6078 | 0.0033 |

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

(Large watch) = (Intercept)

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

Have you studied Proc LOGISTIC: CLASS Variable Parameterization?

(Large watch) = (Intercept) - (Medium watch) - (Small watch)

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

How did you get the above equation, please prove it or elaborate?

Thank you!

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

Have you studied the link I suggested or other resources that you can find by searching (of which there are many)? When you understand the definition of effect coding (or any other coding system), it's just an algebraic problem. I would be happy to address any informed and detailed questions you might have.

That said, different coding systems are just different parameterizations of the *same model*: regardless of coding, the LSMEANS and differences among LSMEANS are the same. I applaud your interest in understanding coding, but I also encourage you to focus on what might be more important.

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

**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.