Optimization of Large-Scale Culture Conditions for the Production of Cordycepin with Cordyceps militaris by Liquid Static Culture

Table 5

Results of regression analysis of Plackett-Burman design.

Symbol	Regression analysis
	Effect	Coefficient	Standard error	𝑇	𝑃
		845.82	32.86	25.74	0.000^∗∗
𝑋1	190.88	95.44	32.86	2.90	0.027^∗
𝑋2	149.23	74.62	32.86	2.27	0.064
𝑋3	−40.85	−20.42	32.86	−0.62	0.557
𝑋4	244.10	122.05	32.86	3.71	0.010^∗
𝑋5	62.81	31.41	32.86	0.96	0.376
𝑋6	−176.15	−88.08	32.86	−2.68	0.037^∗
𝑋7	−127.39	−63.69	32.86	−1.94	0.101
Ct Pt		276.82	73.48	3.77	0.009^∗∗

^∗5% significance level; ^∗∗1% significance level; 𝑋₁--𝑋₇ are symbols shown in Table 1.