The data shown here represent a single replicate of a 25 design that is used in an
Chapter 14, Problem 14-14(choose chapter or problem)
The data shown here represent a single replicate of a 25 design that is used in an experiment to study the compressive strength of concrete. The factors are mix (A), time (B), laboratory (C), temperature (D), and drying time (E).(a) Estimate the factor effects. (b) Which effects appear important? Use a normal probability plot. (c) If it is desirable to maximize the strength, in which direction would you adjust the process variables? (d) Analyze the residuals from this experiment.
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