The popularity of online surveys has increased the prominence of using weights that capture units' probabilities of inclusion for claims of representativeness. Yet, much uncertainty remains regarding how these weights should be employed in analysis of survey experiments: Should they be used or ignored? If they are used, which estimators are…

This study was designed to determine what happens to the intelligence quotient of freshman students during their enrollment at a private Negro college. The Otis Quick-Scoring Mental Ability Test, Gamma Em, was administered to 822 students from a population of approximately 2,000 in their freshman year at Hampton Institue, Hampton, Virginia. The…