Which of the following represents an example of regression to the mean?
a. Each year a baseball player hits more home runs than the previous year.
b. After ten trials of a correlational design, the standard deviation increases.
c. After winning an Oscar, an actress has trouble finding jobs in feature films.
d. Furniture from famous people tends to sell at similar prices to those from non-famous people.
Question 2
A researcher is unable to retest some of his participants in a before-after design because they have dropped out of the program. This is an example of a(n) ________threat.
a. attrition
b. retesting
c. maturation
d. confounding
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