Some Researchers Contend That Anxiety Is Detrimental to Performance, While

Short Answer

Some researchers contend that anxiety is detrimental to performance, while other researchers contend that anxiety actually enhances performance. To help shed light on this question, Dr. Patterson has her participants work on crossword puzzles both before and after being exposed to an anxiety-inducing stimulus. The scores on an anxiety rating scale from her 4 participants are presented below.
Using α = .05, test the null hypothesis that the two groups do not differ.