# Question: preliminary data analyses indicate that the assumptions for using pooled...

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Preliminary data analyses indicate that the assumptions for using pooled t-procedures are satisfied. Independent random samples of 102 plots with cropland and 100 plots with grassland yielded the given summary statistics for the number of species of bird. At the 1% significance level, do the data provide sufficient evidence to conclude that a difference exists in the mean number of species in the two regions? Cropland Grassland x overbar 1 = 14.51 x overbar 2 = 15.33 s 1 = 4.62 s 2 = 4.57 n 1=102 n 2=100 Determine the critical value or values.