Suppose that to save time and money, you recommend delivering the survey to only some of the families who have children attending the school.

Suppose that to save time and money, you recommend delivering the survey to only some of the families who have children attending the school. How would you go about sampling to get a representative sample of families? Why would you use this type of sampling and not some other type? What size sample would be adequate if you learn that there are 300 different families who have children attending this school?