Table 4

Results of parametric (t - test) and non-parametric (Wilcoxon Signed-Rank) tests.

t-test

Nonparametric

Variable

Comparison groups

p

p


δ13C

A vs. B

3,6E-10

1,17E-06

δ13C

C vs. D

0,97

0,73

δ13C

E vs F

0,12

0,33

δ13C

G vs. H

0,15

0,15

δ13C

C vs. E

2,2E-05

2,9E-04

δ13C

D vs. F

3,1E-07

9,8E-04

δ13C

I vs. J

0,17

0,04

δ18O

A vs. B

0,85

0,93

δ18O

C vs. D

0,01

0,02

δ18O

E vs F

0,08

0,18

δ18O

G vs. H

1,4E-12

1,2E-05

δ18O

C vs. E

0,52

0,46

δ18O

D vs. F

0,08

0,09

δ18O

I vs. J

0,01

0,03


Results of tests performed on twelve possible paired comparisons between two genera of South American equids. The definition of groups is the same as for table 3. p: significance level. p < 0.05 in bold.

Prado et al. BMC Ecology 2011 11:15   doi:10.1186/1472-6785-11-15

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