The researchers in the article “A Study of Cardiovascular Function in Diving Reflex Response” sought to test how the diving reflex, as simulated by a facial immersion into water, would affect heart rate and diastolic blood pressure. They used 80 healthy human participants from ages 18 to 25 years old as their sample size. Their data sets comprised of multiple cases that included comparisons between mean heart rates at rest, during hands submersion, and during facial submersion. Mean diastolic blood pressures under similar conditions were also compared. Data sets were compared with one another using 6 different cases. To analyze the data, the researchers incorporated methods such as mean, standard deviation, and t-tests to see if there were significant differences between data sets within the 6 comparison cases.

Nepal, O., Sharma, K., Mander, S., & Sarina, K. (2015). A Study of Cardiovascular Function in Diving Reflex Response. International Journal of Scientific and Research Publications, 5(3). Retrieved from: http://www.ijsrp.org/research-paper-0315/ijsrp-p3918.pdf