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

Showing results for

Find a Community

- Home
- /
- Analytics
- /
- Stat Procs
- /
- How would you model this outcome?

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

- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Email to a Friend
- Report Inappropriate Content

2 weeks ago

I want to compare the mean/median of a variable X between 2 independent samples. Variable X is continuous, ranges from <1 week to 32 weeks. The problem is, I have increments of weeks (1, 2, 3, 7, ...32) and then 30% of the data which is <1 week. How should I model this variable, should I assign it a randome value like 0.5 weeks?

- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Email to a Friend
- Report Inappropriate Content

2 weeks ago

Are you counting <1 week as 0 weeks? If so, PROC FMM and PROC GENMOD can fit zero-inflated count models.such as ZIP and ZINB.

- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Email to a Friend
- Report Inappropriate Content

2 weeks ago

It probably doesn't matter what value you assign to the <1 cases if you use a rank-based nonparametric test as are available in PROC NPAR1WAY.

- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Email to a Friend
- Report Inappropriate Content

2 weeks ago

Yes, this just occured to me too! Have just modelled it as 0 and used NP methods. Thank you all for your input.