Question: Moran 1974 presented data on the relationship for Australian births

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?
Further information on Down Syndrome and maternal age can be found at

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