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
A completely randomized design (CRD) is a plan for collecting data in which an independent random sample is selected from each population of interest.A single factor experiment is a experiment testing one variableThe level of a factor is called a treatmentThe observations collected per each level are called replicatesCONCEPTS IN DESIGN OF EXPERIMENTS
EXAMPLEA manufacturer of paper used for making grocery bags is interested in improving the tensile strength of the product. Product engineering thinks that tensile strength is a function of the hardwood concentration in the pulp. A team of engineers responsible for the study decides to investigate four levels of hardwood concentration: 5%, 10%, 15%, and 20%. They decide to make up six test specimens at each concentration level, using a

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