The feature that distinguishes stratified sampling from other ...

[AEWBW]

The feature that distinguishes stratified sampling from other forms of probability sampling is that only stratified samples
 a. involve partitioning the parent population into mutually exclusive and exhaustive subsets.
  b. allow the a priori determination of the probability that any population element will be included in the sample.
  c. make the probability of selection of any population element equal.
  d. involve partitioning the parent population into mutually exclusive and exhaustive subsets and selecting a simple random sample from each subset.
  e. None of these are correct.

Question 2

Social media marketing campaigns:
 a. can be designed to go viral.
  b. need to be developed with a specific target market in mind.
  c. are impossible to measure.
  d. are series of random activities.

[JaynaD87]

Answer to Question 1

d

Answer to Question 2

b