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 mean tensile strength based on Hardwood Concentration.
![Hardwood
Observations
Concentration (%)
3
4
5
6
5
7
8
15
11
10
10
12
17
13
18
19
15
15
14
18
19
17
16
18
20
19
25
22
23
18
20](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Ff046adb6-f6d1-4c9d-a636-31bb2599d4f9%2Ff1fc40e9-eda3-479c-a1c4-4b5a6f8dddb6%2Fpz4fy4_processed.png&w=3840&q=75)
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