Testing evolutionary hypotheses about human biological adaptation using cross-cultural comparison

Sex ratio at birth will be negatively correlated with total fertility rate.

Test
Test Name	Support	Significance	Coefficient	Tail
Phylogenetic method CONTINUOUS of Pagel (1999)	Supported	p < 0.01	r = -0.30	`UNKNOWN`

Variables
Variable Name	Variable Type	OCM Term(s)
Total Fertility Rate	Independent	Conception
Sex ratio at birth	Dependent	Birth Statistics

Main Author	Published Year	Hypothesis	Supported	Variables Tested
Barber, Nigel	2004	The secondary sex ratio will decline as total fertility increases.	Supported	2	Cite Related Hypotheses More By Author
Barber, Nigel	2004	The sex ratio at birth will decline with polygyny.	Partially Supported	2	Cite Related Hypotheses More By Author
Barber, Nigel	2004	The sex ratio should be higher in countries where contraception is widely practiced.	Supported	2	Cite Related Hypotheses More By Author
Mace, Ruth	2003	Sex ratio at birth will be negatively correlated with the mortality rate of those under 1 year of age.	Supported	2	Cite Related Hypotheses More By Author
Sellen, Daniel W.	1997	A culturally independent association exists between dependence on agriculture and fertility(879).	Supported	2	Cite Related Hypotheses More By Author