Help? base-factor ANOVA

ABC

help?

so i have kids: id,class, grades (math, eng, lit, art, yearly average).

3 classes: (9th, 10th, 11th)

we try to see if there is a Expected value difference between classes.

H0: E1=E2=E3

H1: 1 is diferent

JASP input: (scale-average, c-class)

output:

If I understood this correctly then our BF is 2.798, so It's a bit more likely that we get H0 then rejecting it (=not getting the H1). so basiclly there aint much difference between classes, right?

[at least by E - they get a bit more likelly to get to the PO as they grow)

or did i completly messed it up?

also, can anyone explain to me what the bfm means and why BF 10 is 1 for the null model?

[sorry if my questions are dumb - i learn this program on my own]

thank you!

EJ

Maybe it is a good idea to go over some of the examples in papers such as this one here:

van den Bergh, D., van Doorn, J., Marsman, M., Draws, T., van Kesteren, E.-J., Derks, K., Dablander, F., Gronau, Q. F., Kucharsky, S., Komarlu Narendra Gupta, A. R., Sarafoglou, A., Voelkel, J. G., Stefan, A., Ly, A., Hinne, M., Matzke, D., & Wagenmakers, E.-J. (2010). A tutorial on conducting and interpreting a Bayesian ANOVA in JASP. L'Année Psychologique/Topics in Cognitive Psychology, 120, 73-96. [press "télécharger" for the free pdf]