The paper "Effects of Canine Parvovirus (CPV) on Gray Wolves in Minnesota" (Journal of Wildlife Management [1995]: 565-570) summarized a regression of y = percentage of pups in a capture on x = percentage of CPV prevalence among adults and pups. The equation of the least-squares line, based on n = 10 observations, was y = 62.9476 - 0.54975x, with r2 = .57.
a. One observation was (25, 70). What is the corresponding residual?
b. What is the value of the sample correlation coefficient?
c. Suppose that SSTo = 2520.0 (this value was not given in the paper). What is the value of se?