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A recent study 41 compared 298 children with autism spectrum disorder to 1507 randomly selected control...

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A recent study 41 compared 298 children with autismspectrum disorder to 1507 randomly selected control childrenwithout the disorder. Of the children with autism 20 of the mothersand used antidepressants drugs during the year before pregnancy orthe first trimester of pregnancy. Of the control children, 50 ofthe mothers had used the drugs.
a. is there a significant association between prenatal exposure toantidepressants medicine and the risk of autism?. Test whether tgeresults are significant at the 5%level.

b.can we conclude that prenatal exposureantidepressants medicine increases the risk of autism in the child?why or why not?

c. the article describing the study contains thesentence \" No increase in risk was found for mothers with a historyof mental health treatment in the absence of prenatal Exposure toselective serotonin reuptake inhibitors [antidepressants]. why didthe researchers conduct this extra analysis

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