Good website design can make Web navigation easier. A sample of 8 users using a conventional Web design averaged 32.3 items identified, with a standard deviation of 8.88. A sample of 11 users using a new structured Web design averaged 44.9 items identified, with a standard deviation of 11.02. Can we conclude that the mean number of items identified is greater with the new structured design?
Test the null hypothesis. H₀ μ₁ : μ₂ versus the alternative hypothesis. Hₐ : μ₁ < μ₂. Using α = 0.005, find the following assuming that the population variances are different
the degrees of freedom V = _____