An experiment has run a single replicate of a 2⁴design and calculated the following factor effects:

(a) Construct a normal probability plot of the effects.

(b) Identify a tentative model, based on the plot of effects in part (a).

(c) Estimate the regression coefficients in this model, assuming that yÌ… = 400.

AB = 53.25 80.25 A = 80,25 AB ABC ABD = -2.95 AC = 11.00 AD = 9,75 BC = 18.36 BD = 15.10 B = -65.50 %3D = -8.00 10.25 = 10.25 = -7.95 11.00 C= -9,25 D= -20.50 ACD BCD ABCD -6.25 15.10 CD = -1.25