Robust quality design:

The bonding strength of an adhesive has been studied as a function of temperature (T) in and pressure (P) as kg/cm². Data obtained are given.

	Temperature
30	90
Pressure	120	90	58
74	30
140	138	96
168	104

Questions:

1. Establish the reduced statistical model after significance test (at 5% significance level) using Analysis of Variance (ANOVA).
2. What will be the bonding strength if temperature=65 and pressure=125?
3. Identify the optimal process setting for maximum bonding strength.
4. Establish the confidence interval of mean of bonding strength (at 95% confidence level)

C