An article in Industrial and Engineering Chemistry (More on Planning Experiments to Increase Research Efciency, 1970, pp.

An article in Industrial and Engineering Chemistry (“More on Planning Experiments to Increase Research Efficiency,” 1970, pp. 60–65) uses a 25-2 design to investigate the effect of A = condensation temperature, B = amount of material 1, C = solvent volume, D = condensation time, and E = amount of material 2 on yield. The results obtained are as follows:

e = 23.2;

ad =16.9;

cd = 23.8;

bde = 16.8

ab = 15.5;

bc = 16.2

ace = 23.4;

abcde = 18.1

Prepare an analysis of the variance table for this design. Preferably using Minitab or excel:

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