# STAT 6510: Survey Sampling Methods

## Welcome and Announcements

Nov 16: As promised, the final homework assignment is posted.

Nov 16: As promised, sample SAS code for eatimating the parameters in a random-effects logistic regression (for model-based logistic regression with clusters) is on the computing page.

Nov 16: Exam 2 questions with finer point allocations and the data analysis are posted in the "content" section of Carmen.

Oct 23: A clarification for Homework question 44: In the second stage of the sample, you should just take a simple random sample of players within the selected teams.

Oct 10: I uploaded the annotated notes for cluster sampling. There was indeed a missing set of parentheses on page 23. They are now added in.

Oct 3: I updated the Block Example notes for cluster sampling.

Oct 2: I have added some code to the .pdf file for homework 5 that will help you assign regions to each of the samples in the agsrs dataset for Lohr problem 4.16.

Sept. 29: I have fully updated the website with the most recent notes from class. I have also posted solutions to homework 5. Note that you will learn the last bit of computing for questions 4 and 5 in class on Monday. I have also posted a bit more information about the midterm exam, along with an old exam, in the exams section of the website. Have a good weekend!

Sept. 22: You might find the following bit of code helpful for looking at the sample variance of a variable within groups. The code below first sorts by the grouping variable, and then applies the "univariate" procedure within each group via the "by" statment.

```proc sort data=mysaslib.jail_size_15;
by size;
run;

proc univariate data=mysaslib.jailpop;
var V24;
by size;
ods select moments;
run;
```

Sept. 17: While looking at the solutions for Homework 3, I noticed that the code I had provided for SRS total estimation was missing the specification of the weights. I've updated and corrected the SRS instructions and SAS code on the website.

Sept. 17: Also, I've assigned groups that you can see on Carmen (look at the class list, and sort by group). And, I've posted the next homework assignment. Note that the new individual assignment and the first group assignment are both due a week from today. After this first week, the individual homeworks will not regularly be due on Mondays.

Sept. 17: I've posted information about the class project under the 'project' link at the right.

Sept. 11: Thanks to a student's prompting, I found that my updates of the slides with annotation had not been working. I've now updated the slides up to lecture 4. Note that you may need to refresh your browser if it's stored an old version of the file. I'll update lecture 5 on 9/12 when we've finished that section. I've also posted lecture 6 to the website.

Sept. 5: I've posted another section of notes.

Aug. 30: I've posted another section of notes and tentaive exam dates: October 5 and December 9.

Aug. 24: I've posted a basic SAS computing tutorial in the computing section, which we will be covering on Monday.

Aug. 24: The TA's office hours are 2-3pm on Wednesdays, in MA 422.

Aug. 22: As promised, the syllabus is updated with my office hours: Wed. 9:15-11:00am.

Aug. 19: Welcome to Survey Sampling Methods! I will be using this site to post notes, homeworks, and announcements, so check back often. I'll be using the Carmen system to maintain the gradebook for this course, as well as occasionally post restricted items. I'll let you know about these as we need them.