确认population和sample
问题描述：
确认population和sample
A sociologist obtains a list of 520 members of a local business and professional women's club and mails a questionnaire to 100 of these women selected random.Only 48 questionnaries are returned.What is the poopulation in this study?what is the sample from whom iinformation is actually obtained?
答
population is 520
the sample size is 100
information is actually obtained from 48 people