An investigator found that the proportion of graduates of private high schools who are admitted to prestigious colleges is much higher than the proportion of public high school graduates whom these colleges admit. The investigator might conclude that private high schools do a better job-preparing students for college. Or, and investigator could propose many other hypotheses. Choose the correct hypothesis. Which of the following is a hypothesis of common cause?
a. the same things that motivate parents and students to select private schools instead of public schools motivate them to do what is necessary to get into prestigious colleges.
b. admissions officers in prestigious colleges are biased in favor of private school graduates.
c. the milieu of private schools is more similar to college than the milieu of public schools.
Question 2
Choose the intersubject difference control that best corresponds with the following statements. Only boys of ages 6-8 from an urban community were selected for a study.
a. ANCOVA
b. Homogeneous selection
c. Randomized matching
d. Random selection
e. Use subjects as their own controls
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