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Table 2 Binomial probability analysis of births by Indian-born women living in Norway where all older siblings are girls, by sex and birth order, 1969-2012

From: Changing trend? Sex ratios of children born to Indian immigrants in Norway revisited

 

Period

 

1969-1986

1987-1996

1997-2005

2006-2012

Second order births

Male births/all births

76/152

110/224

122/240

124/259

Percentage boys

50.0

49.1

50.8

47.9

z

−0.335

−0.675

−0.163

−1.121

Third order births

Male births/all births

14/39

35/57

40/65

27/57

Percentage boys

35.9

61.4

61.5

47.4

z

−1.932

1.517*

1.642*

−0.603

  1. *: Significant at the 0.10 level.
  2. Since we consider testing of one-sided hypotheses, we do not report (two-sided) confidence intervals for the probability parameter.