The advantage of a stratified random sample over a random sample ...

[stevenposner]

The advantage of a stratified random sample over a random sample is that
 
  A) stratified random samples require less work than random samples.
  B) stratified random samples are more likely to represent accurately a population, because stratification on key variables virtually assures accurate representation on those variables.
  C) the random sample is not a probability sample.
  D) stratified random samples provide both a probability and a nonprobability sample in one procedure.

Question 2

Stratified random sampling procedures are used when
 
  A) certain subgroups are more prevalent in some samples than others.
  B) it is important to ensure that subgroups within a population are adequately represented in the sample.
  C) the population being sampled is homogeneous.
  D) it is important to ensure that certain subgroups of a population are not included in the sample.

[aburgess]

Answer to Question 1

Answer: B

Answer to Question 2

Answer: B

[stevenposner]

Thank you!

[aburgess]

Always glad to help...