Question: Preliminary data analyses indicate that you can reasonably consider the assumptions for using pooledt-procedures satisfied. Independent random samples of 102 plots with cropland and 100

Preliminary data analyses indicate that you can reasonably consider the assumptions for using pooledt-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

x1=14.27

s1=4.97

n1=102

Cropland

Grassland

x2=15.04

s2=4.59

n2=100

Determine a 90% confidence interval for the difference between the mean number of native species in the two regions.

The 90% confidence interval is from ? to ?

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