y1

Coef.

Std. Err.

t

p > t

95% Conf.

Interval

Heptachlore

5.921637

5.712366

1.04

0.305

−5.563844

17.40712

Aldrine

14.26146

6.018301

2.37

0.022

2.160854

26.36207

Endosulfan

1.657955

2.945423

0.56

0.576

−4.264215

7.580125

Hexachloro-benzene

5.3886

2.085737

−2.58

0.013

−9.582257

−1.19495

dieldrine

−7.91355

8.929184

−0.89

0.38

−25.86687

10.03978

chlordane

−1.30459

3.169409

−0.41

0.682

−7.677114

5.067935

lindane

−3.41232

8.729988

−0.39

0.698

−20.96513

14.1405

β-BHC

19.38133

7.802382

2.48

0.017

3.693587

35.06907

∆-BHC

−7.27033

5.919586

−1.23

0.225

−19.17246

4.631794

Dichloro-biphenyl

3.476438

1.880966

1.85

0.071

−0.3054978

7.258374

Endrine aldéhyde

−0.00019

0.000409

−0.45

0.651

−0.0010093

0.000637

_cons

1.243286

0.363495

3.42

0.001

0.5124307

1.974142