[Sent to B. Olson and to the EdStat list; I am not a member of the other lists to whom the original message was posted.]
Brittawni, you write (inter alia) "But because I have only 4 paired comparisons b/n schools I have no statistical power and cannot run HLM." Can't say as I understand this. How is this situation different from having "only" (!) four levels of a design factor in ANOVA? Or perhaps I should ask, What is it that you need statistical power FOR, that is not adequately handled in your present design? In general, as regards statistical power, what you have is what you have, unless you have the leisure and the resources to acquire more data, or to repeat the evaluation on a grander scale; neither of which is possible for you, if I am not mistaken. I can imagine that you might not be pleased with the results, if the observed effects are subtle enough not to be "significant". I'm having difficulty imagining characteristics of a computer program designed to run HLM (by which I take it you mean "hierarchical linear modeling", and not a typo for GLM, or "general linear model"), or of your data, or of the interface between them, that would *prevent* your running the program; but this seems to be what you claim to be the case. Perhaps you could clarify the point? On Mon, 3 Nov 2003, Brittawni L. Olson <[EMAIL PROTECTED]> wrote (edited): > Greetings, I have a dilemma I am hoping list serve members can assist > me with. I am doing a program evaluation wherein the program was > given in 4 schools to all 6th graders; then a booster of that program > was given to all 7th graders the following year (same kids basically). > I also have 4 comparison schools selected based on demographic and > geographic similarities b/n populations served by schools. > Because the selection unit of analysis is schools and the evaluation > data is collected from individual students I have what would be a > two-level model. But because I have only 4 paired comparisons b/n > schools I have no statistical power and cannot run HLM. What > alternative statistical analyses could be done on these data given the > concern about unit of analysis and power? > > Brittawni L. Olson, Ph.D. Candidate > Project Director > Drug Free Communities Support Project > Lincoln Council on Alcoholism & Drugs, Inc. > 914 L Street > Lincoln NE 68508 > P: 402-475-2695 > F: 402-475-2699 > E: <mailto:[EMAIL PROTECTED]> [EMAIL PROTECTED] ----------------------------------------------------------------------- Donald F. Burrill [EMAIL PROTECTED] 56 Sebbins Pond Drive, Bedford, NH 03110 (603) 626-0816 . . ================================================================= Instructions for joining and leaving this list, remarks about the problem of INAPPROPRIATE MESSAGES, and archives are available at: . http://jse.stat.ncsu.edu/ . =================================================================
