subgroups

Hello everybody, I am currently working on a study with heart patients. I have no data yet but am trying to write up my methodology and am currently thinking about how to do the statistics to evaluate my hypothesis. I am a bloody beginner in regards to statistic and would be thankful for any...

I know I've been posting a lot here lately, this is my last one: I have one independent variable (categorical) and want to determine its effect on two separate dependent variables. I know I could use MANOVA for this. But what do I use if I want to determine the effect of an independent variable...

Hi I have four groups of variables A, B, C and D. The variables A and B also have (natural) sub-groups (say A1, A2, A3 and B1, B2 and B3). I want to compare them as follows: A - B - C - D (using ANOVA for 4 groups) A1 - B1 (using t test for two samples) A2 - B2 (using t test for two samples)...

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...

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...