id: 06164027
dt: j
an: 2013c.00727
au: Peled, Ofra N.; Peled, Irit; Peled, Jonathan U.
ti: Uncommon knowledge of a common phenomenon: intuitions and statistical
thinking about gender birth ratio.
so: Int. J. Math. Educ. Sci. Technol. 44, No. 1, 59-69 (2013).
py: 2013
pu: Taylor \& Francis, Abingdon, Oxfordshire
la: EN
cc: K45 M65
ut: statistical thinking; gender birth ratio; cognitive conflict; intuition
ci:
li: doi:10.1080/0020739X.2012.690898
ab: Summary: The phenomenon of birth of a baby is a common and familiar one,
and yet college students participating in a general biology class did
not possess the expected common knowledge of the equal probability of
gender births. We found that these students held strikingly skewed
conceptions regarding gender birth ratio, estimating the number of
female births to be more than twice the number of male births. Possible
sources of these beliefs were analysed, showing flaws in statistical
thinking such as viewing small unplanned samples as representing the
whole population and making inferences from an inappropriate
population. Some educational implications are discussed and a short
teaching example (using data assembly) demonstrates an instructional
direction that might facilitate conceptual change.
rv: