A manufacturer of paper used for making grocery bags is interested in improving
ID: 2932023 • Letter: A
Question
A manufacturer of paper used for making grocery bags is interested in improving the tensile strength of the product. Tensile strength is a function of the hardwood concentration in the pulp and the range of practical interest is between 5 and 20%. A team of engineers decides to set up a test to investigate four levels of hardwood concentration: 5, 10, 15, and 20% and test six specimens at each concentration level, all tests were run in random order.An uncompleted ANOVA table is seen below.
a.Complete the ANOVA table by filling the “?” with the appropriate values.
b. Assuming the assumptions for ANOVA are satisfied, perform a 0.05 Hypothesis test. Be sure to state your conclusion in terms of the hardwood concentration
Source DF SS MS F p-value Recepie 0.000 Error 130.17 Total 512.96Explanation / Answer
Soorce of variation sum of squares Degrees of freedom mean square F Recepie 382.79 3 127.96 19.6 Error 130.17 20 6.51 Total 512.96 23
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