Which type of sampling is most at risk for sample bias? a. ...

[kodithompson]

Which type of sampling is most at risk for sample bias?
 
  a. Quota
  b. Random
  c. Purposive
  d. Convenience

Question 2

The nurse researcher knows that a sample is representative of a population when which statement is true?
 
  a. The sample is homogeneous.
  b. All units of a population are included.
  c. The most readily accessible persons are used as subjects.
  d. The characteristics of the sample closely approximate those of the population.

[mochi09]

Answer to Question 1

ANS: D

Feedback
A Quota sampling, if done appropriately, will not create sample bias.
B Random sampling should act to counteract sample bias.
C Purposive sampling would selectively include research subjects and avoid sampling bias.
D Convenience sampling is most at risk for sample bias.

Answer to Question 2

ANS: D

Feedback
A A homogeneous sample is not the ultimate criterion for evaluating a sample.
B Population elements or unit inclusion is important but not the ultimate criterion.
C Ready subject accessibility does not constitute the most important evaluative criteria.
D The foremost criterion in evaluating a sample is its representativeness.