4. Trout experiment, continued The data in Table 8.13 show the measurements of hemoglobin (grams per 100 ml) in the blood of brown trout. (The same data were used in Exercise 15 of Chapter 3.) The trout were placed at random in four different troughs. The fish food added to the troughs contained, respectively, *x* = 0, 5, 10, and 15 grams of sulfamerazine per 100 pounds Table 8.13 Data for the trout experiment X Hemoglobin (grams per 100 ml)
0 5 10 6.7 7.8 5.5 8.4 7.0 7.8 8.6 7.4 5.8 7.0 9.9 8.4 10.4 9.3 10.7 11.9 7.1 6.4 8.6 10.6 10.4 8.1 10.6 8.7 10.7 9.1 8.8 8.1 7.8 8.0 15 9.3 9.3 7.2 7.8 9.3 10.2 8.7 8.6 9.3 7.2 Source: Gutsell, J. S. (1951). Copyright© 1951 International Biometric Society. Reprinted with permission.
of fish. The measurements were made on ten randomly selected fish from each trough after 35 days.