11.8 Laboratory experiments designed to measure LC50 values for the effect of certain toxicants on fish are basically run by two different methods.

One method has water continuously flowing through laboratory tanks, and the other has static water conditions. For purposes of establishing criteria for toxicants, the Environmental Protection Agency (EPA) wants to adjust all results to the flow-through condition. Thus, a model is needed to relate the two methods. Observations on certain toxicants examined under both static and flow-through conditions yielded the following measurements

(in parts per million):

Fit the model by the method of least squares.
Y = b0 + b1x + e

Transcribed Image Text:

LC50 Flow- Toxicant Through y LC50 Static x 1 23.00 39.00 234569 22.30 37.50 9.40 22.20 9.70 17.50 0.15 0.64 0.28 0.45 7 0.75 2.62 8 0.51 2.36 9 28.00 32.00 10 0.39 0.77