A research project is conducted by offering a randomly selected 300 of the 500 local Toyota Prius owners a chance to use a new fuel additive for 6 months to see if their gas mileage improves. 225 of the 300 randomly selected Prius owners agree to the offer, 50 of those drop out of the project after 1 month, another 50 drop out after 2 months, and 25 more drop out after 3 months. The rest remain for the duration of the project. Using the intention to treat method, the results from how many of the Prius owners who were not selected to be a part of the project should be included in the research project?
A) 100
B) 200
C) 325
D) 400

Question

Quizplus · Accepted Answer

The intention to treat method includes all participants who were originally allocated to each group, regardless of whether they completed the study. Since 300 were selected and 200 were not part of the study, the results from the 200 not selected should be included to maintain the integrity of the original random assignment.

A Research Project Is Conducted by Offering a Randomly Selected