The decline of salmon fisheries along the columbia river in oregon has caused great concern among commercial and recreational fishermen. the paper 'feeding of predaceous fishes on out-migrating juvenile salmonids in john day reservoir, columbia river' (trans. amer. fisheries soc. (1991: 405-420) gave the accompanying data on 10 values for the data sets where y = maximum size of salmonids consumed by a northern squaw fish (the most abundant salmonid predator) and x = squawfish length, both in mm. here is the computer software printout of the summary: coefficients: estimate std. error t value pr(> |t|) (intercept) −89.010 16.720 −5.324 0.000 length 0.704 0.049 14.333 0.000 using this information, compute a 95% confidence interval for the slope.