The Maryland division of Weight Watchers is doing research to determine how many people on the Weight Watchers diet cheat at least once a week. They decide that anonymous surveys will give
them an accurate representation but do not have time to get responses from ALL the Maryland
Weight Watchers people. Read the scenarios below and determine which of the 7 sampling methods
best describes it.
I. Randomly select 10 members from each of the WW centers in the Maryland division.
II. Use an alphabetical listing of all Maryland division members. Randomly choose a
starting person on the list. Then select every 20th person thereafter.
III. Randomly select 2 or 3 branches of the Maryland division and survey every member
of that center.
IV. Send out the survey to every member of the Maryland division. Place drop boxes in
each WW center. Anyone who returns a survey will be in the sample.
V. The Maryland regional office is in Baltimore so they survey members at the WW
center in Baltimore.
VI. From a numbered list of all Maryland, division members use a computer to randomly
select 100 numbers and survey all members with those corresponding numbers.
What is the population of interest in the WW situation?