Statistical methods
A statistical analysis was performed using Excel (Microsoft Corp.) and MathCracker Solvers Statistics (Understanding that the proper quality of resuscitation is of the utmost importance, and taking into account whether all evaluated CPR components were performed correctly at the same time by students, we arranged the data into pivot tables and calculated the relative frequencies of students who had tested components within the correct range. Since the numbers of students in the CC1 and CC3 groups differed, the relative success rates for each tested component were calculated and compared. The relative frequency is the percentage of students who correctly executed a given parameter among all students in the group. The Pearson chi-square test was used to test whether the relative success rate in the CC3 group was higher than in the CC1. For successful CPR, it is also important that the above-mentioned CPR components are kept correct simultaneously. Therefore, using the same test, we analyzed the proportions of students keeping 4, 3, 2, 1, and 0 components correctly (