42. The article Production of Gaseous Nitrogen in Human Steady-State Conditions (J. Appl. Physiol., 1972: 155—159) reports the following observations on the amount of nitrogen expired (in liters) under four dietary regimens: (1) fasting, (2) 23% protein,

(3) 32% protein, and (4) 67% protein. Use the Kruskal—Wallis test (Exercise 41) at level .05 to test equality of the corresponding mi s.

1. 4.079 4.859 3.540 5.047 3.298 4.679 2.870 4.648 3.847 2. 4.368 5.668 3.752 5.848 3.802 4.844 3.578 5.393 4.374 3. 4.169 5.709 4.416 5.666 4.123 5.059 4.403 4.496 4.688 4. 4.928 5.608 4.940 5.291 4.674 5.038 4.905 5.208 4.806