A personal computer assembly company is interested in studying the time it takes to assemble a computer under different conditions.Specifically,two factors are to be controlled: Factor A (Sample)is the number of individual work stations in the line and Factor B (Columns)is whether the assembly was done on day shift,swing shift,or graveyard shift.The following data were obtained in the study where the response variable is the time required to assemble the PC from start to final test. 
Carry out the appropriate statistical tests using an alpha equal .05 level.
Definitions:
Primary Walls
The thin, flexible and extensible layer of the cell wall that is first formed when a plant cell is growing, made mainly of cellulose and other polysaccharides.
Scanning Electron Microscopy
A type of electron microscopy that produces high-resolution images of the surface of a sample by scanning it with a focused beam of electrons.
Electron Beam
A stream of electrons moved through a vacuum or air, utilized in various applications including welding and electron microscopy.
Integrins
Receptor proteins that bind to specific proteins in the extracellular matrix and to membrane proteins on adjacent cells; transmit signals into the cell from the extracellular matrix.
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