(1) A 283 IV design has runs and factors of 2 levels each.

(2) In a resolution IV design, a two-factor interaction is not aliased with, but is possibly aliased with .

(3) For a 295 III design, we can estimate factorial effects (besides the intercept). Each main effect is aliased with otherfactorial effects.

(4) The fundamental principles for factorial effects are , , and .

(5) A central composite design using a 251 V design and 3 center points has total runs