turn on suggestions

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
- /
- Proc Stdrate how SAS calculate the variance of the...

Topic Options

- 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

09-20-2016 12:11 PM - edited 09-20-2016 12:12 PM

Hi,

I'm looking at how SAS calculate the variance of the rate in the jth stratum of the study population, particularly in Example 107.1.

The data provided only gives the aggregated form- so how did they calculate the variance, say the variance of the rate in the group Male, age 0-14 in state of Alaska?

Thank you,

Huong

Accepted Solutions

Solution

09-20-2016
03:53 PM

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

09-20-2016 03:48 PM

Flashback to intro stats - *SD of a rate is sqrt(p*(1-p)/n)*

Here's are the mathematical formulas:

In general, you have a rate with the N known, and we make assumptions regarding the distribution of said rate. Based on this we can calculate the bounds on the rate using the specific formula's.

And I'll move your post to the Stats Forum so you can get some better answers.

All Replies

Solution

09-20-2016
03:53 PM

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

09-20-2016 03:48 PM

Flashback to intro stats - *SD of a rate is sqrt(p*(1-p)/n)*

Here's are the mathematical formulas:

In general, you have a rate with the N known, and we make assumptions regarding the distribution of said rate. Based on this we can calculate the bounds on the rate using the specific formula's.

And I'll move your post to the Stats Forum so you can get some better answers.

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

09-20-2016 03:53 PM

Thank you! I was a bit confused since the support file didn't specify the Poisson assumption....