Consider the experiment described in Problem 6-5. Analyze this experiment assuming that each one of the four replicates represents a block.

Problem 6-5.

A router is used to cut locating notches on a printed circuit board. The vibration level at the surface of the board as it is cut is considered to be a major source of dimensional variation in the notches. Two factors are thought to influence vibration: bit size (A) and cutting speed (B). Two bit sizes (1/16 and 1/18 inch) and two speeds (40 and 90 rpm) are selected, and four boards are cut at each set of conditions shown below. The response variable is vibration measured as the resultant vector of three accelerometers (x, y, and z) on each test circuit board.

Transcribed Image Text:

Replicate Treatment A B Combination II III IV (1) 18.2 18.9 12.9 14.4 a 27.2 24.0 22.4 22.5 b 15.9 14.5 15.1 14.2 + ab 41.0 43.9 36.3 39.9 AI| + +