A manufacturer of paper used for making grocery bags is interested in improving

Question

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 hardwood 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 of 20%. They decide to make up six test specimens at each concentration on level, using a plot plant. All 24 specimens are tested on a laboratory tensile tester, in random order. Data are shown below This is an example of A. a paired T-test B. a randomized block experiment C. a 2^2 DOE D. statistical process control E. a completely randomized experiment F. a multiple linear regression. A B C D E F

Explanation / Answer

Randomized block design

this is because one platn is considered as one bloack and one treatment as treatment and one treatment is given to 6 specimen in a block

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