extremely significantp < 0.01
Among interaction effects, X 2 X 4 and X 2 2 had extremely significant differences (p < 0.01); X 1 X 2 significantly differed (p < 0.05); and the rest were not significant.
Among interaction effects, X 2 X 4 and X 2 2 had extremely significant differences (p < 0.01); X 1 X 2 significantly differed (p < 0.05); and the rest were not significant.