A psychologist wants to investigate if there is a significant difference in anxiety levels before and after a treatment. He collects data from a random sample of 50 individuals and wants to conduct a hypothesis test. Which of the following procedures is most appropriate for him to use?




© 2024 Fiveable Inc. All rights reserved.
AP® and SAT® are trademarks registered by the College Board, which is not affiliated with, and does not endorse this website.

© 2024 Fiveable Inc. All rights reserved.
AP® and SAT® are trademarks registered by the College Board, which is not affiliated with, and does not endorse this website.