If family houses and apartment buildings are mixed together,
count all the households in order. For example,
if there are three family houses and then an eight-storey
apartment building with one apartment per floor and you
need to select every 7th household, you will need to visit
the household on the 5th floor of the apartment building.
If your study site is a sparsely populated area with houses
scattered without clear roads (multiple paths may lead to
different houses from the starting point), you should follow
the same instructions as above and flip a coin every
time you have to choose between two households. If there
are more than two paths leading to more than two houses,
first flip a coin to choose between the two closest houses,
and then flip a coin again to choose between the next two
houses, and so forth. Remember that the number of people
you will be interviewing in each area depends on the
overall population of the area. You may have to interview
only a few respondents in one village and as many as a few
hundred in another