A researcher, in attempting to sample the population of Cleveland, decides to select 5 households from each block designated for inclusion in the sample. The blocks themselves are to be selected with variable probabilities depending on their size. This is an example of
a. one stage area sampling.
b. quota sampling.
c. simple two stage area sampling.
d. probability proportional to size area sampling.
e. systematic sampling.
Question 2
Probability proportional to size sampling requires that a
a. certain proportion of second stage units will be selected from each first stage unit.
b. fixed number of second stage units be selected from each first stage unit selected.
c. variable ratio of first stage units be selected.
d. variable proportion of first stage units be selected.
e. None of the above.
Genetic drift and population size.
World Population Growth, 1750-2150
Sample prescriptions of antibiotics for dental infections.
Population and Settlement
Population growth rate %
Bacteria Population