Supplementary material: Statistical evaluation supporting Table 3.

DDT 0.5g/cm2 versus control

Two Sample Independent t-Test of alanine/glycineratios

Summary Statistics

Sample Mean SD SE

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1. Control 1.465 0.15299 0.04838

2. 0.5g/cm2 DDT 1.618 0.3152 0.09968

------

Difference of Means: -0.153

Null Hypothesis: Mean1 - Mean2 = 0

Alternative Hypothesis: Mean1 - Mean2 > 0

t DoF P Value

------

-1.38092 18 0.18421

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At the 0.05 level, the difference of the population means

is not significantly different than the test difference (0).

DDT 1.0g/cm2 versus control

Two Sample Independent t-Test of alanine/glycine ratios

A) with all datapoints included

Summary Statistics

Sample Mean SD SE

------

1. 1.0g/cm2 DDT 1.75286 0.13376 0.05055

2. Control 1.465 0.15299 0.04838

------

Difference of Means: 0.28786

Null Hypothesis: Mean1 - Mean2 = 0

Alternative Hypothesis: Mean1 - Mean2 > 0

t DoF P Value

------

4.01179 15 0.00113

------

At the 0.05 level, the difference of the population means

is significantly different than the test difference (0).

B) with highest alanine point excluded to ensure that the relationship is not based on this single elevated point.

Summary Statistics

Sample Mean SD SE

------

1. 1.0g/cm2 DDT 1.71598 0.09772 0.03989

2. Control 1.465 0.15299 0.04838

------

Difference of Means: 0.25098

Null Hypothesis: Mean1 - Mean2 = 0

Alternative Hypothesis: Mean1 - Mean2 > 0

t DoF P Value

------

3.57747 14 0.00303

------

At the 0.05 level, the difference of the population means

is significantly different than the test difference (0).

Endosulfan 0.5g/cm2 versus control

Two Sample Independent t-Test of alanine/glycine ratios

Summary Statistics

Sample Mean SD SE

------

1. Control 1.465 0.15299 0.04838

2. Endo 0.5g/cm2 1.936 0.27613 0.08732

------

Difference of Means: -0.471

Null Hypothesis: Mean1 - Mean2 = 0

Alternative Hypothesis: Mean1 - Mean2 > 0

t DoF P Value

------

-4.71816 18 0.00017

------

At the 0.05 level, the difference of the population means

is significantly different than the test difference (0).
Endosulfan 1.0g/cm2 versus control

Two Sample Independent t-Test of alanine/glycine ratios

Summary Statistics

Sample Mean SD SE

------

1. Control 1.465 0.15299 0.04838

2. Endo 1.0g/cm2 2.7125 0.64044 0.22643

------

Difference of Means: -1.2475

Null Hypothesis: Mean1 - Mean2 = 0

Alternative Hypothesis: Mean1 - Mean2 > 0

t DoF P Value

------

-5.99249 16 0.00002

------

At the 0.05 level, the difference of the population means

is significantly different than the test difference (0).

1