Directional and nondirectional hypotheses can be easily interchanged according to the hypothesis the researcher is testing. For instance, a drug company might predict that a drug will help a subject lose weight while another drug company might predict that a drug will alter a subject’s weight.
DNP-801A-INTRODUCTION TO DNP STUDIES
Zaccagnini, M. E., & Pechacek, J. M. (2021). The doctor of nursing practice essentials: A new model for advanced practice nursing (4th ed.). Jones and Bartlett Learning. ISBN-13: 97811284079708