A Researcher Has Collected Nationwide Data for the Age of Mothers

question 5

Multiple Choice

A researcher has collected nationwide data for the age of mothers at the time of birth of their children and the incidence of Down syndrome. What relationship between mothers' age and Down syndrome is this researcher likely to find?

• A) a very weak relationship
• B) incidence of Down syndrome increases with mothers' age
• C) incidence of Down syndrome decreases with mothers' age
• D) incidence of Down syndrome increases with mothers' age up to age 35 then decreases

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