The big problem with case studies is selection. This is the same ...

[tfester]

The big problem with case studies is selection. This is the same as problems associated with _____.
 
  a. internal validity c. external validity
  b. random sampling d. random assignment

Question 2

Let's assume you are conducting an experiment to determine the effect of a new drug on the incidence of epileptic seizures. You select 20 epileptics from the 150 epileptics being treated at a nearby hospital and administer the drug to them. You record the number of seizures in each of the 20 subjects for one month. Then you record the number of seizures in each of the 20 subjects for one month without the drug. Being compulsive, you also record the number of seizures for the remaining 130 epileptics for one month. The number of seizures for each of the 130 epileptics constitutes _________.
 
  a. the dependent variable c. a statistic
  b. data d. independent variable

[akemokai]

Answer to Question 1

C
External validity is the extent to which observations can be generalized to a larger group than the one studied. When a case is selected for study using the case study method, it often is unusual in some way, making it impossible to generalize from that case to a larger group.

Answer to Question 2

B