# weighting

1. ### Ordinal Model: Acceptability/alternatives to using mean and weighting factors

I've been asked to validate a model created by someone else and need some help on how the final score is calculated. Have put lots of detail; apologies for the post length. The output (dependent) variable is ordinal scale with 5 points (i.e. 1-5) representing an assessment of risk (not risky...
2. ### How to show covariates are balanced after IPTW

I am attempting to perform an inverse probability of treatement weighting on observational data. I can perform the IPTW, however the problem I have is after obtaining the weights/balancing groups, how would i go about showing a baseline table of the new "pseudo population" to show covariates are...
3. ### Sample mean differs from population mean due to weighting

Hi folks, The disclaimer first: I'm not primarily trained in statistics, so this problem might sound very naive to the experienced statisticians. Your expertise is what I'm looking for and any help is highly appreciated. Now the problem: I am supposed to calculate total chocolate consumption...
4. ### how to normalize demand/availability matrix for Citibike data

I am not a statistician but would appreciate an outside perspective on my current project analyzing citibike data. This is a bit complicated so please bear with me. My goal is to determine to what extent bikes are delivered to stations when they need them, that is, the the average amount of...
5. ### how does stata calculate confidence intervals for age standardised means/proportions

Dear Stat Talkers! I'm using the following Stata command (see help mean): mean x, std(a) stdw(b) over(c) to get age-standardised mean or proportion of a variable of interest x. a= variable for age-group and b= variable for weights for each group. x can be a continuous variable or a...
6. ### weighting of aligned subsequences by their length

I have a pool of subsequences, each one associated with a probability (and other properties that you don't need to know) that quantifies how frequently that subsequence occurs. In order to select those subsequences that may be part of a longer sequence (template sequence), I align them to the...
7. ### Longitudinal weighting

Hi all. Wish you all well. I have to do weighting for an alcohol longitudinal study(2011-2013). How do I go about getting the final weights? Some people stopped responding as the survey progressed leaving only the drinkers responded in the end(2013). Does it sound statistically right...
8. ### when to weight frequencies and variables, and how to determine category boundaries

Should income categories of a sample intercept survey be weighted to match the income proportions of the population of a city? Also, what guidelines should be used when deciding on category breaks between income groups? When looking at responses to various questions between income groups...
9. ### Need help: Can i genaralize to the population, or do i have to weight my data?

I have a sample of 194 households from 3 villages. The number of hh from each village is 61, 67 and 66. I used a 90% confidence level and 10% margin of error to determine sample sizes. (total household population for all three villages is 4194 households). The total sample size for all three...
10. ### sample weighting/rim weighting/raking

Hello, I have the following problem. I have a sample of people say 5 people as shown below, with information on some behavior of theirs, lets say purchases made by them at store 1, store 2, store 3. I also know how much in dollars each store sold to all its customers, say store 1 sold a...