Compare means across multiple groups simultaneously. Includes full ANOVA table, effect size (ฮทยฒ), and Tukey HSD post-hoc tests. Supports one-way and two-way designs.
SS Between (groups):
SSB = ฮฃแตข nแตข(xฬแตข โ xฬ..)ยฒ
SSW = ฮฃแตข ฮฃโฑผ (xแตขโฑผ โ xฬแตข)ยฒ
F = (SSB/dfB) / (SSW/dfW) where dfB = kโ1, dfW = Nโk
Effect size (eta-squared):
ฮทยฒ = SSB / SST
Tukey HSD critical difference:
HSD = q(ฮฑ, k, dfW) ร โ(MSW/nโ)
Enter data for a balanced two-way ANOVA. Each cell may contain multiple replicates (comma-separated). Leave empty cells blank for equal replication.
For balanced design with a levels of A, b levels of B, n reps per cell:
SS_A = bn ร ฮฃแตข(xฬแตข. โ xฬ..)ยฒ
SS_B = an ร ฮฃโฑผ(xฬ.โฑผ โ xฬ..)ยฒ
SS_AB = n ร ฮฃแตข ฮฃโฑผ (xฬแตขโฑผ โ xฬแตข. โ xฬ.โฑผ + xฬ..)ยฒ
SS_err = ฮฃแตข ฮฃโฑผ ฮฃโ (xแตขโฑผโ โ xฬแตขโฑผ)ยฒ