Manufacturing and Product Development Pig iron is a mixture of iron ore, charcoal from coal, and limestone, melted together under very high pressure. This type of iron is usually refined and used to produce wrought iron, cast iron, or steel. A random sample of the production and shipment of pig iron (in 100 metric tonnes) per month in Canada was recorded.
Use the four methods presented in this section to determine whether there is any evidence to suggest the data are from a non-normal population.