Let m1 and μ2 denote true average densities for two different types of brick. Assuming n...

Let m1 and μ₂ denote true average densities for two different types of brick. Assuming normality of the two density distributions, test versus using the following data: m = 6, = 22.73, s₁ = .164, n = 5,= 21.95 and σ₂ = .240