Experimental Design: Problem Set
QUESTIONSThe tensile strength of Portland cement is being studied. Four different mixing techniques can be used economically. The following data have been collected: MixingTechniques Tensile Strength (lb/in2) 1 3129 3000 2865 2890 2 3200 3300 2975 3150 3 2800 2900 3985 3050 4 2600 2700 2600 2765 Test the hypothesis that mixing techniques affect the strength of the cement. Use $\alpha=0.05$.Construct a graphical display as described in Section 3...
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