C This question 2 point s possible 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 OA The parameter of interest is difference in average lifespan between sons and daughters OB The parameter of interest is difference in average lifespan between mothers of sons and mothers of daughters OC The parameter of interest is average numbers of sons and daughters OD The parameter of interest is difference in average lifespan of mothers in Australia e Identify the nature and scope of the conclusion regarding what the results may or may not indicate Submit test OA For this group having sons was associated with a decrease in lifespan of an average of 47 weeks per son while having daughters was associated with an unspecified increase in lifespan Without random assignment there is no way to know that having sons caused a decrease in lifespan OB For this group having children was associated with a decrease in lifespan of an average of 47 weeks per child Without random assignment there is no way to know that having sons caused a decrease in lifespan OC For this group having daughters was associated with an increase in lifespan of an average of 47 weeks per daughter while having sons was associated with an unspecified decrease in lifespan