1. A forester is studying the number of cavity trees in old growth stands in Adirondack Park in northern New York. He wants to know if there is a significant difference between the mean number of cavity trees in the Adirondack Park and the old growth stands in the Monongahela National Forest. He collects two independent random samples from each forest. Use a 5% level of significance to test this claim.

Adirondack Park Monongahela Forest

n1= 51 stands n2= 56 stands

= 39.6 = 43.9

s1= 9.4 s2= 10.7