In 1978 a popular science magazine reported that a study of women in Poland indi
ID: 3355968 • Letter: I
Question
In 1978 a popular science magazine reported that a study of women in Poland indicated that having sons shortened the lifespans of mothers by about 28 weeks pers son, but that daughters helped to lengthen the mothers' lives. The data came from church records from the period 1602 to 1822. 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? This is a V observational study c) Identity the subjects studied, and how they were selected The subjects were V " How were these subjects selected? O A. The data were collected from randomly selected church records. o B. The women were randomly selected. O C. The selection process is unknown. O D. The women volunteered for the study . d) Identity the parameter of interest. OA. The parameter of interestis difference in average lifespan between mothers of sons and mothers of daughters. o B. The parameter of interest is difference in average lifespan between sons and daughters O C. The parameter of interest is average numbers of sons and daughters. Click to select your answer.Explanation / Answer
(a) The above research is an observational study i.e it is a study where researchers collected data and based on what is infer based on the data collected.
(b) This is a retrospective observational study as it looks backwards from the period 1602 to 1822.
(c) The subjects were the life span of mother's of and sons and daughters.
The subjects were selected (A) the data were collected from randomly selected church records.
(d) Parameter of interest is : (A) the difference in average lifespan between mothers of sons and mothers of daughters.
(e) Nature and scope: (B) having sons was associated with an decrease in lifespan of an average 28 weeks per son, while having daughters was associated with an unspecified increase in lifespan.