mean on the mean do you t: Use the fact ne point (x, y) x+10.] This ean: students l, do less well, 5.59 Beavers and beetles. Do beavers benefit beetles? Re- searchers laid out 23 circular plots, each 4 meters in diameter, in an area where beavers were cutting down cottonwood trees. In each plot, they counted the num- ber of stumps from trees cut by beavers and the number of clusters of beetle larvae. Ecologists think that the new sprouts from stumps are more tender than other cottonwood growth, so that beetles prefer them. If so, more stumps should produce more beetle larvae. Here are the data: 26 BEAVERS age 124), you Stumps 221 3 3 4 3 1 2 5 5 1 3 Beetle larvae 10 30 12 24 36 40 43 11 27 56 18 40 Stumps 212 2 1 1 4 1 2 1 4 82.2 Beetle larvae 25 8 21 14 16 6 54 9 13 14 50