in 1978 a popular science magazine reported that a study of women in Australia indicated...

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in 1978 a popular science magazine reported that a study of women in Australia indicated that having sons shortened the lifespans of mothers by about 47 weeks per son but that daughters helped to lengthen the mothers lives The data came from church records from the period 1605 to 1887 Answer parts a through e below a Identify whether the above research is an observational study or an experiment The described research is an b Was the study retrospective or prospective observational study This is a c Identify The subje How were retrospective prospective d how they were selected 2 OA T www or the study OR The women were randomly selected

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