Manufacturing and Product Development
Sixtyfive countries account for approximately 99% of the world crude steel production.41 Four of these countries were selected, and a random sample of their crude steel production per month (in thousand tonnes) was obtained. The data are given in the following table.
Assume the underlying distributions of crude steel production per month are continuous. Use the Kruskal-Wallis test with a = 0.05 to determine whether there is any evidence to suggest that at least two production populations are different.