Modelling and Optimization Studies on a Novel Lipase Production by Staphylococcus arlettae through Submerged Fermentation

Table 2

Results of significance test on the nonlinear model coefficients, standard errors, 𝑇 statistics, and 𝑃 values for the lipase activity (coded form).

SI. no.	Standard
	Terms	Coefficient	Error coefficient	𝑇	𝑃
1	Constant	3.528	0.071	49.618	0.000
2	𝑋1	−0.0117	0.058	−0.199	0.846
3	𝑋2	0.118	0.058	2.021	0.068
4	𝑋3	−0.102	0.058	−1.746	0.109
5	𝑋4	0.514	0.058	8.778	0.000
6	𝑋5	0.012	0.058	0.209	0.838
7	𝑋1^2	−0.075	0.158	−0.478	0.642
8	𝑋2^2	1.574	0.158	9.944	0.000
9	𝑋3^2	−0.707	0.158	−4.425	0.001
10	𝑋4^2	0.484	0.158	3.059	0.011
11	𝑋5^2	−0.560	0.158	−3.541	0.005
12	𝑋1𝑋2	−0.182	0.062	−2.929	0.014
13	𝑋1𝑋3	−0.287	0.062	−4.520	0.001
14	𝑋1𝑋4	0.049	0.062	0.674	0.514
15	𝑋1𝑋5	0.041	0.062	0.674	0.514
16	𝑋2𝑋3	0.323	0.062	5.204	0.000
17	𝑋2𝑋4	0.083	0.062	1.339	0.208
18	𝑋2𝑋5	0.103	0.062	1.661	0.125
19	𝑋3𝑋4	−0.010	0.062	−0.171	0.867
20	𝑋3𝑋5	−0.035	0.062	−0.574	0.578
21	𝑋4𝑋5	−0.158	0.062	−2.547	0.027
	SS = 0.2484	𝑅^2 = 96.6%		𝑅^2 (adj) = 90.5%