Any bias in selecting subjects for an experiment threatens the ...

[cabate]

Any bias in selecting subjects for an experiment threatens the _____________ of the experiment.
 
  a. internal validity
  b. internal reliability
  c. statistical validity
  d. statistical reliability

Question 2

Loss of subjects during the course of a research project usually introduces bias because
 
  a. the resulting sample is too small
  b. subjects are not lost on a random basis
  c. descriptive statistics cannot be used on the resulting data
  d. inferential statistics cannot be used on the resulting data

[mrphibs]

Answer to Question 1

a

Answer to Question 2

b

[cabate]

Great answer, keep it coming

[amandalm]

Gracias!