Federal employees still receive their positions as a result of patronage and relationships with politicians and political parties

The interrupted time-series design is able to control for regression to the mean because

A) by employing multiple measures, it gives several points of comparison over a long period of time. B) it adds a constant to all scores. C) it multiplies all scores by a constant. D) by taking refined measurements, the design uses only one composite score, thereby reducing error variance.

__________ is the ratio of the sample size to the size of the target population

Fill in the blanks with correct word