Question

A plating company has two silver plating systems with variances s₁² and s₂². You, as the manager, desired to compare the variability in the silver plating done by System-1 with that done by System-2. If independent random sample of size n₁= 12 of the System-1 yields s₁ = 0.042 mil and sample of size n₂= 10 of System-2 yields s₂ = 0.038 mil, does this support s₁²= s₂²? (Use a = 0.05)

Please draw the distribution curve and indicate rejection regions.

Answer 1