Question

1. Use the data on lettuce yields in Exercise 2.2.

Treatment (lb N/acre)	Head of lecture/plot
0	104	114	90	140
50	134	130	144	174
100	146	142	152	156
150	147	160	160	163
200	131	148	154	163

1. Compute the analysis of variance for the dat
2. Determine the best polynomial response function that describes the relationship between lettuce yield and nitrogen fertilizer at the .05 level of significance.
3. Plot the observed means along with the estimated equation.

Answer 1