The paper “Feeding of Predaceous Fishes on Out-Migrating Juvenile Salmonids in John Day Reservoir, Columbia River” (Transactions of the American Fisheries Society [1991]: 405–420) 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:

Use the accompanying output from MINITAB to answer the following questions.

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 attributed to the approximate linear relationship between the two variables?

Transcribed Image Text:

X y X y 218 82 375 165 246 270 287 85 94 127 386 216 414 450 219 238 318 141 468 249 344 157