An unbiased sample occurs when a sample is taken and not everyone ...

[neverstopbelieb]

An unbiased sample occurs when a sample is taken and not everyone in the population has an equal or known chance of being selected.
 
  Indicate whether the statement is true or false

Question 2

Reflect on the Are You Equipped Now at the end of the chapter.
 
  If the decrease in pain reported by participants was due to internal changes that occurred within the participant over a three month time period, which of the following was a threat to internal validity?
 
  a. selection
  b. maturation
  c. regression to the mean
  d. attrition

[johnharpe]

Answer to Question 1

F

Answer to Question 2

B