A 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 hard-wood concentration in the pulp and that the range of hardwood concentrations of practical interest is between 5 and 20%. 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 pilot plant. Using the data given below: a. Complete the ANOVA table. b. At 0.05 significance level, test whether there is a difference in mean tensile strength based on Hardwood Concentration.
A 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
a. Complete the ANOVA table.
b. At 0.05 significance level, test whether there is a difference in
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