The advantages of stratified over simple random sampling include ...

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The advantages of stratified over simple random sampling include stratified sampling
 a. ensures adequate representation from each stratum of interest.
  b. can produce more precise sample statistics.
  c. allows for the comparison of variables between strata.
  d. Both b and c.
  e. All of the above.

Question 2

A researcher divides the population of the purchasers of Brand X into heavy and light users. He then chooses a random sample independently from each group. This is an example of __________ sampling.
 a. nonprobability
  b. random
  c. judgmental
  d. stratified
  e. quota

[mochi09]

Answer to Question 1

E

Answer to Question 2

D

[bucstennis@aim.com]

Excellent

[at]

Gracias!