I need to know the types of tests I need to be thinking about for this stats project. I will then go and look up the specific tests you recommend. The data is from all 50 states for the years 1960-2010.
I think the best way to illustrate the data is to show an example (I just made up numbers):
State Condition Score Alabama1995 Condition 1 .534 Alabama1996 Condition 1 .343 Alabama1997 Condition 1 .545 Alabama1998 Condition 2 NA Alabama1999 Condition 2 .344 .... Alaska1995 Condition 2 .434 Alaska1996 Condition 2 .444 Alaska1997 Condition 2 NA Alaska1998 Condition 3 .456 Alaska1999 Condition 3 .678 Alaska2000 Condition 3 .437 .... Maine1995 Condition 3 .343 Maine1996 Condition 3 .342 Maine1997 Condition 3 .543 Maine1998 Condition 1 .439
So what I want to know is if the conditions and scores are statistically different. Do states when under condition 3 have a significant difference from states when under 2 or 1?
Let's say a state in a given year was either condition 1, 2, 3.
Not all states could have a score computed for them, but most did.
I want to evaluate the following types of things:
- What is the relationship between conditions and scores?
- What is the relationship between time and conditions and scores?
- When a state changed from condition 1 to condition 2, was the change in score significant?
- Does condition 1 overall have a higher/lower score than other conditions?
Are there other things besides simple significance tests I should be thinking about?
Ideally something that R (Rcmdr!) can do nicely. Stata, SPSS are also available to me.