Consider the following computer output for one replicate of a 2⁴factorial experiment.

(a) What effects are used to estimate error?

(b) Calculate the entries marked with €œ?€ in the output.

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Estimated Effects and Coefficients Effect Coef SE Coef Term Constant 35.250 39.26 0.000 2.250 24.75012.375 13.78 0.000 1.000 0.500 0.56 0.602 10.750 5.375 5.99 0.002 A*B -10.500 -5.250 -5.85 0.002 A*C 4.250 2.125 2.37 0.064 -5.000 - 2.500 A*D -2.78 0.039 B*C 5.250 2.625 2.92 0.033 B*D 4.000 2.000 2.23 0.076 -0.750 -0.375 C*D -0.42 0.694 S = 3.59166 Analysis of Variance Source DF MS A 0.266 1 2450.252450.25189.940.000 0.310.602 в 4.00 4.00 462.25 462.25 35.830.002 AB 441.00 441.00 34.190.002 AC 72.25 72.25 5.600.064 AD 100.00 100.00 7.750.039 вс 1. 110.25 110.25 8.550.033 BD 64.00 64.00 4.960.076 2.25 2.25 CD 0.170.694 Residual Error ? 64.50 Total ? 3791.00 ABCAAA