The problem of selection refers to the fact that _____. a. ...

[tuffie]

The problem of selection refers to the fact that _____.
 
  a. people may compare the performance of the subjects with the norm for performance on that variable in the general population
  b. people select themselves when they volunteer for an experiment
  c. people de-select themselves when they fail to complete the study
  d. both b and c

Question 2

Descriptive statistics are used to make inferences about the population.
 
  Indicate whether the statement is true or false

[Madisongo23]

Answer to Question 1

A
Even in studies in which there is no actual control group, people have a tendency to compare the performance of the subjects with what is normal for the society as a whole.

Answer to Question 2

F

[tuffie]

Gracias!

[mohan]

Thanks for the timely response, appreciate it