Sex ratio among the second order babies, depending on gender of first born.
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https://figshare.com/articles/dataset/_Sex_ratio_among_the_second_order_babies_depending_on_gender_of_first_born_/601077
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资源简介：
P value compared to the overall sex ratio of 910 for the period 1905–2005.
#Difference in proportion of sex ratios in column B & C.
*Significant.
创建时间：
2013-02-21
