# Recent content by smithosaurus

1. ### Calculate values for all permutations of categorical variables

Hi all, So my particular approach may be completely wrong, so let me provide a high level goal first: The data I'm working with is visitor demographic features with a score. Currently I am using 14 demographic features, each with up to 5 levels. I want determine which partition of...
2. ### Help with the Beta Distribtuion

Background: I'm currently trying to learn how to use Bayesian Analysis for split testing two sets of binomial data. (Web analytics, Multi-Armed Bandit approach, etc). The Beta distribution kept coming up in this research, so Im trying to understand and apply it better. So, the best...
3. ### Determining the power of a 2-Sample T-Test

So I am running a two-sample t-test , and wanted to set some preliminary accuracy goals. Ideally, I wanted to end the test when there was a statistically significant difference, using an alpha level of 1%, and power of 90%. However, this will be my first time setting a power criteria for...
4. ### Unique Counts and Averages over Subgroups

Hi all, This is kinda similar to the question I had last week, but I think its a little more complicated. Basically I have two variables, and I want to perform actions in relation to unique combinations of these variables. DATE TIME PLAYER SCORE 2012/8/1 Evening BOB...
5. ### Column of values of unique subgroup counts...

Hi, So I have a data frame, and I would like to add an additional column which shows the total sum of rows within the subgroups... heres a simple example grp=c("A","A","A","A","A","B","B","B","B","C","C") hour=c(1,1,1,2,2,1,1,1,2,1,1) test=data.frame(grp,hour,score) grp hour 1 A 1...