Author Question: Sample attrition would be reflected by the: a. average death rate of the population under study. ... (Read 72 times)

Evvie72 · **on:** Jul 8, 2018

Sample attrition would be reflected by the:

a. average death rate of the population under study.
b. inability to access identified members of a population.
c. number of patients who die while participating in a study.
d. number of patients who drop out of a study.

Question 2

A sample that accurately reflects the characteristics of the population from which it is drawn is a:

a. cluster sample.
b. purposive sample.
c. random sample.
d. representative sample.

welcom1000 · **Reply #1 on:** Jul 8, 2018

Answer to Question 1

ANS: D
Sample attrition or mortality is the withdrawal or loss of subjects from a study.
Sample attrition or mortality is the withdrawal or loss of subjects from a study.
Sample attrition occurs after the sample has been created. If members of the population cannot be accessed, they would not be subjects to begin with. Sample mortality is the withdrawal or loss of subjects from a study.
Although death may decrease sample size in some studies, that is not the meaning of mortality in the case of sample mortality. Sample mortality is the withdrawal or loss of subjects from a study.

Answer to Question 2

ANS: D
Representativeness means that the sample, accessible population, and target population are alike in as many ways as possible.
Knowing a sample is a cluster sample tells how it was created, but does not define a representative sample. Representativeness means that the sample, accessible population, and target population are alike in as many ways as possible.
Knowing a sample is a purposive sample tells how it was created, but does not define a representative sample. Representativeness means that the sample, accessible population, and target population are alike in as many ways as possible.
Knowing a sample is a random sample tells how it was created, but does not define a representative sample. Representativeness means that the sample, accessible population, and target population are alike in as many ways as possible.