Preliminary data analyses indicate that you can reasonably consider the assumptions for using pooled t-procedures satisfied. Independent random samples of 102 plots with cropland and 100 plots with grassland yielded the given summary statistics for the number of native species Cropland Grassland X, 14.28 X, 15 22 54 64 ny 100 475 n 102 Detormine a 90% confidence interval for the difference between the mean number of native species in the hwo regions. The 90% confidence interval is from ton (Round to three decimal places as needed.)