JoAnn, Ann, and Bryon were all laboratory analysts, performing standardized chemical tests on various materials. JoAnn was hired first, with no previous experience, and was trained on the job by the supervisor. She later trained Ann. When Bryon was hired, he was trained by the supervisor with the assistance of the two women. All initially worked the same shift and received the same pay. Then Bryon received a 5-cent-per-hour raise and was to work a swing shift every other two weeks. Was his higher wage a violation of the Equal Pay Act?