W.W. Menard has conducted research involving manganese nodules, a mineral-rich concoction found abundantly on the deep sea floor.11 In one portion of his report, Menard provides data relating the magnetic age of the earth's crust to the "probability of finding manganese nodules." The table gives the number of samples of the earth's core and the percentage of those that contain manganese nodules for each of a set of magnetic-crust ages. Do the data provide sufficient evidence to indicate that the probability of finding manganese nodules in the deep sea earth's crust is dependent on the magnetic-age classification?

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Number of Percentage with Samples Nodules Age Miocene-recent Oligocene Eocene Paleocene Late Cretaceous Early and Middle Cretaceous 5.9 17.9 16.4 21.4 21.1 14.2 11.0 140 247 1120