In Kenya, human-induced land-use changes and excessive resource extraction has threatened the jungle ecosystem by reducing animal grazing areas and disrupting access to water sources. In Landscape & Ecology Engineering (Jan. 2013), researchers compared hippopotamus grazing patterns in two Kenyan areas — a national reserve and a community pastoral ranch. Each area was subdivided into plots of land. The plots were sampled (406 plots in the national reserve and 230 plots in the pastoral ranch) and the number of hippo trails from a water source was determined for each plot. Sample statistics are provided in the table. The researchers concluded that the mean number of hippo trails was higher in the national reserve than in the pastoral ranch. Do you agree? Support your answer with a 95% confidence interval.

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National Reserve Pastoral Ranch Sample size: 406 230 Mean number of .31 .13 trails: Standard deviation: .4 .3