To study the effect of curing temperature on shear
Chapter 5, Problem 1E(choose chapter or problem)
To study the effect of curing temperature on shear strength of a certain rubber compound, 80 specimens were cured at \(150^{\circ} \mathrm{C}\) and 95 were cured at 130°C. The specimens cured at \(150^{\circ} \mathrm{C}\) had an average shear strength of 620 psi, with a standard deviation of 20 psi. Those cured at \(130^{\circ} \mathrm{C}\) had an average shear strength of 750 psi, with a standard deviation of 30 psi. Find a 95% confidence interval for the difference between the mean shear strengths of specimens cured at the two temperatures.
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