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Complete_randomized_design_week_11 - Design of experiments...

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Design of experimentsAn experiment with completely randomized design (CRD)Single factor experimentTreatmentsReplicatesData layoutData plotANOVA techniqueSources of variationSums of SquaresDegrees of freedomF-test and assumptionsFinal ANOVA table
Acompletely randomized design (CRD)is a plan for collectingdata in which an independent random sample is selected fromeach population of interest.Asingle factor experimentis a experiment testing one variableThelevelof a factor is called atreatmentThe observations collected per each level are calledreplicatesCONCEPTS IN DESIGN OF EXPERIMENTS
EXAMPLEA manufacturer of paper used for making grocery bags isinterested in improving thetensile strengthof the product.Product engineering thinks that tensile strength is a function ofthe hardwood concentration in the pulp. A team of engineersresponsible for the study decides to investigate four levels ofhardwood concentration: 5%, 10%, 15%, and 20%. They decide tomake up six test specimens at each concentration level, using a

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