Author Question: Stratified random sampling procedures are used when we wish to A) represent accurately subgroups ... (Read 140 times)

stephzh · **on:** Aug 4, 2018

Stratified random sampling procedures are used when we wish to

A) represent accurately subgroups of a population in the sample.
B) study geological events.
C) employ a larger sample.
D) take a random sample from the entire population.

Question 2

What is a major problem with simple random sampling?

A) The researcher needs a list of all the members of a population, which is difficult to obtain for a large population.
B) The researcher needs to contact all the people in the population, which would be difficult for a large population.
C) The sample usually over-represents certain segments of the population.
D) There is a systematic bias that leads to persons with certain characteristics having a higher probability of being selected.