We question the use of mechanical models, such as coin flipping, to represent the probabilities of gender distributions in sibship families consisting of two children. Both the assumptions of the models and the reliability of the data should be evaluated. Using models without these critical evaluations may tend to perpetuate myths rather than elucidate biological realities.
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1 April 2011
The Truth about Models: How Well Do Mechanical Models Mimic the Observed Gender Distributions in Two-Child Families?
William D. Stansfield,
Matthew A.Carlton
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binomial distribution
birth order
chi-square test
conditional probability
data quality
Lexis variation
model assumptions
