A severe drought has affected several western states in rece…

A severe drought has affected several western states in recent years.  A Christmas tree farmer is worried about the drought’s effect on the size of his trees.  To determine whether the growth of his trees has been reduced by the drought, the farmer decides to take a sample of the heights of 6 trees and obtains the following results (recorded in inches): Tree Height 1 60 2 57 3 62 4 69 5 46 6 54 Find the standard deviation of the heights of this sample of 6 trees.

Assume that the following statistics have already been calcu…

Assume that the following statistics have already been calculated for the weights and heights of your favorite species of animals:    Variance of height (variable X) = 100 inches2    Variance of weight (variable Y) = 2,500 lb2    Covariance between weight and height = 200 inches x lb Calculate the correlation between weight and height in this sample of animals.