An experiment was designed and performed to determine the effect of pressure, temperature, and humidity on total oil yield per batch of peanuts. The objective is to maximize the yield. Use =0.03.

Run order	Pressure (bar)	Temperature (C)	Humidity (%)	Yield
1	415	95	15	71
2	550	75	10	21
3	415	75	10	53
4	550	95	15	54
5	415	75	10	63
6	550	95	10	79
7	415	95	10	38
8	550	75	15	61
9	415	95	15	74
10	550	75	15	66
11	415	95	10	36
12	550	75	10	24
13	415	75	15	24
14	550	95	10	73
15	550	95	15	56
16	415	75	15	23

1. Construct and interpret an interaction graph for the most significant interaction of two factors.
2. Using Tukey method determine the levels at which the process must operate.

IN EXCEL