A population of trees has a mean leaf length of 6.2 inches. A sample of 17 of these trees in a particular neighborhood has a mean length of 3.2 inches. If SS = 144 for this sample, what is Cohen's d...

A population of trees has a mean leaf length of 6.2 inches. A sample of 17 of these trees in a particular neighborhood has a mean length of 3.2 inches. IfSS= 144 for this sample, what is Cohen'sdfor this example, and what is the strength of the treatment effect, which in this case is growing in a particular neighborhood?