A large medical professional organization with membership consisting of doctors, nurses, and other medical employees wanted to know how its members felt about HMOs (health maintenance organizations)....

A large medical professional organization with membership consisting of doctors, nurses, and
other medical employees wanted to know how its members felt about HMOs (health
maintenance organizations). Name the type of sampling plan they used in each of the following
scenarios:
a. They randomly selected 500 members from each of the lists of all doctors, all nurses, and all
other employees and surveyed those 1500 members.
b. They randomly selected ten cities from all cities in which the members lived, and then
surveyed all members in those cities.
c. They randomly chose a starting point from the first 50 names in an alphabetical list of
members, and then chose every 50th member in the list starting at that point.
Solution:
Sampling is a process whereby small number of individuals are identified and studied in order to
draw statistically valid inferences for estimation about relatively large population of same
characteristics.
a. They...