management workshop reduces

students’ perceived stress levels. She recruits 12 university students and

measures their stress levels using the Perceived Stress Scale (PSS) before the

workshop and again four weeks after the workshop. Higher scores indicate higher

stress levels. The dependent t

test produces the following

result: t(11)=2.45,  p=0.032. The significance level is α = 0.05. What

conclusion should the researcher draw?