Table 4 Significance analysis of experimental parameters for screening test design.
From: Modeling of sand-cultivated substrate for Gobi facility agriculture and validation of trenching test
Parameters | Ratio | Standard errors of coefficients | T-value | P-value | Ranking of significance |
|---|---|---|---|---|---|
Constant term (math.) | 33.04 | 1.32 | 24.99 | 0.000 | – |
T1 | – 0.98 | 1.35 | – 0.73 | 0.479 | 7 |
T2 | 1.65 | 1.35 | 1.22 | 0.242 | 4 |
T3 | – 0.95 | 1.35 | -0.70 | 0.492 | 8 |
T4 | 1.76 | 1.35 | 1.31 | 0.041 | 3 |
T5 | 5.27 | 1.35 | 3.90 | 0.001 | 1 |
T6 | 1.56 | 1.35 | 1.16 | 0.265 | 5 |
T7 | – 1.21 | 1.35 | 0.90 | 0.383 | 6 |
T8 | – 0.86 | 1.35 | – 0.64 | 0.533 | 9 |
T9 | 3.19 | 1.35 | 2.36 | 0.032 | 2 |
