At the pilot stages of the steel production program by a National Steel Company, a 33 Graeco-Latin

Question:

At the pilot stages of the steel production program by a National Steel Company, a 3×3 Graeco-Latin square experiment was carried out to compare the tensile strengths of steel rods produced under different carbon treatments.

The company sourced its iron ore from three mines at I, O, and M. It has steel plants in three cities, A, W, and J. Since the operators in each of these plants have been trained by different nations, A, I, and S, it was thought that their skills might vary. There were also three levels of carbon in the steel produced.

Three replicates of the 3×3 Graeco-Latin square design were obtained as follows: image text in transcribed Rows=steel plants; Columns=mines of iron ore; Latin=operators;