Researchers regard probability sampling as being desirable ...

[plus1]

Researchers regard probability sampling as being desirable because
 
  a. it is an easy and inexpensive way to generate useful research samples.
  b. it reduces the chance of obtaining too a diverse sample for the research.
  c. it gives us confidence that we can generalize from the sample to the population.
  d. it relies on using people who are readily available at any given time.

Question 2

When Seiffge-Krenke et al. (2010) investigated stress across 17 countries, they found that
 
  a. it was important to measure different aspects of stress in different populations.
  b. underlying stress levels were comparable across different types of measurement.
  c. the same factors triggered stress across the different countries.
  d. most of the measurements of stress showed low construct validity.

[sarah_brady415]

Answer to Question 1

c

Answer to Question 2

a