I will try to clarify. I am working on classifying a variable on my data-set that is in the form above. So each person in our study has 4 measures of a variable with about 200 people, so a total of 800 observations. By standard deviation between observations: I mean a number that represents the average standard deviation for variable within each person(just looking within each ID) My statistics background is not strong so I am not sure if I can just use a class statement ID to get standard deviation of variable for each person and then average those standard devs across entire data-set By standard deviations between observations: I want to compare our variable of interest between ID(different people). To see how each ID's variable mean and standard deviation compare with another ID. We want to see if there is more spread within each women(high variation from visit to visit) or more spread between women(high variation from women to women) Hope this helps.
... View more
