The paper Feeding of Predaceous Fishes on Out-Migrating

Chapter 0, Problem 5.46

(choose chapter or problem)

The paper Feeding of Predaceous Fishes on Out-Migrating Juvenile Salmonids in John Day Reservoir, Columbia River (Transactions of the American Fisheries Society [1991]: 405420) gave the following data on y maximum size of salmonids consumed by a northern squawfish (the most abundant salmonid predator) and x squawfish length, both in millimeters: x 218 246 270 287 318 344 y 82 85 94 127 141 157 x 375 386 414 450 468 y 165 216 219 238 249 Use the accompanying output from MINITAB to answer the following questions. The regression equation is size 89.1 + 0.729 length Predictor Coef Stdev t ratio p Constant 89.09 16.83 5.29 0.000 length 0.72907 0.04778 15.26 0.000 s = 12.56 R-sq = 96.3% R-sq(adj) = 95.9% Analysis of Variance Source DF SS MS F p Regression 1 36736 36736 232.87 0.000 Error 9 1420 158 Total 10 38156 a. What maximum salmonid size would you predict for a squawfish whose length is 375 mm, and what is the residual corresponding to the observation (375, 165)?b. What proportion of observed variation in y can be attributedto the approximate linear relationship between thetwo variables?