Medical researchers want to know if listening to music can reduce stress levels. They use the Cohen Perceived Stress scale [taking values from 0 to 40] to measure the stress levels of Senior Executives at the beginning of the study. The Executives then listen to 'calming' music for a period of five minutes before their stress levels are re-measured.

What analysis would you use to test if the calming music reduces stress levels?

Group of answer choices

Binomial Test

Pearson's correlation coefficient / Regression analysis

Cross-tabulation / Chi-Square test

Paired samples t-test

One-sample t-test

Independent samples t-test