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Table 1 Statistical analysis of the Plackett-Burman design for IAA production by Streptomyces fradiae NKZ-259

From: Indole-3-acetic acid production by Streptomyces fradiae NKZ-259 and its formulation to enhance plant growth

Variable/Term

Coefficient

SE coefficient

t-value

p-value

Constant

37.923

0.481

78.77

0.000

X1

2.198

0.481

4.56

0.020*

X2

1.731

0.481

3.60

0.037*

X3

−4.055

0.481

−8.42

0.004*

X4

−1.453

0.481

− 3.02

0.057

X5

0.729

0.481

1.51

0.227

X6

4.142

0.481

8.60

0.003*

X7

7.864

0.481

16.33

0.000*

X8

−2.479

0.481

−5.15

0.014*

  1. R-sq = 99.38% R-sq (adj) = 97.74%
  2. SE, standard error; t, Student’s test; p, corresponding level of significance; *, significance at p < 0.05
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BMC Microbiology

ISSN: 1471-2180

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