Moran (1974) presented data on the relationship, for Australian births, between maternal age and Down syndrome (a serious handicapping condition on which psychologists have done a lot of work). The data follow, though in a form that may require some minor calculations on your part to be meaningful. What can you conclude from these results?

Transcribed Image Text:

Age of Mother Total Number of Births Number of Births with Down Syndrome 20 or less 35,555 15 20-24 207,931 128 25-29 253,450 208 30-34 170,970 194 35-39 86,046 197 40-44 24,498 240 45 or more 1,707 37