A quality assurance researcher wants to significantly improve the tensile strength of the wires produced in the factory. He thought about the nickel concentration and four machine mechanisms as one of the factors. The tensile strengths of the wires from all the treatments are on the table below: Nickel Concen tration in Percentage Machine Mechanism
A quality assurance researcher wants to significantly improve the tensile strength of the wires produced in the factory. He thought about the nickel concentration and four machine mechanisms as one of the factors. The tensile strengths of the wires from all the treatments are on the table below:
|
|
Nickel Concen |
tration in | Percentage | |
|
Machine Mechanism |
60%-40% |
90%-10% | 80%-20% | 70%-30% |
| 1 |
39 |
70 | 45 | 41 |
|
1 |
44 |
65 | 60 | 39 |
| 2 |
44.6 |
45 | 50 | 42 |
|
2 |
69 |
56 | 40 | 50 |
| 3 |
37 |
53 | 65 | 58 |
|
3 |
65 |
48 | 69 | 62 |
| 4 |
39 |
52 | 41 | 36 |
|
4 |
54 |
36 | 43 | 60 |
For visual representation of the table, the photo was attached.
1. At 5% significance, use the anova with two-way replication to see if the machine mechanism has an effect on the tensile strength if the nickel concentration has an effect on the tensile strength, and if there is an interaction between the machine mechanism and silver concentration.
2. If the significance is 1%, will the results change? Why or why not it will change?
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