Regression to the mean causes interpretive difficulties when ...

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Regression to the mean causes interpretive difficulties when
 
  a. attrition is likely.
  b. there is not initial equivalence between the groups.
  c. history influences one group more than the other.
  d. retesting cannot be controlled.

Question 2

A student gets a 99 out of 100 on her first quiz in a psychology class, but gets only a 91 on the next quiz. This is a likely example of which of the following?
 
  a. Selection
  b. Regression to the mean
  c. Maturation
  d. Attrition

[dantucker]

Answer to Question 1

b

Answer to Question 2

b

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Thanks for the timely response, appreciate it

[Jsherida]

TYSM