2.6. Statistical Analysis of Results

The results obtained in the tests were subjected to statistical analysis. The quantitative variables of the parameters subjected to analysis were described using the mean value, standard deviation, as well as the minimum and maximum value. The normality of the distribution of the analysed variables was verified using the Shapiro-Wilk test. The identification of the relationship between the analysed variables involved the determination of the Spearman rank correlation coefficient or the Pearson linear correlation coefficient in relation to the normality of the distribution of given parameters.

The presence of differences between the analysed parameters in the groups (in relation to sex or between the group of the dancers and that of the students) was verified by performing the Student’s t-test for independent samples or the Mann-Whitney U test—depending on the normality of the distribution of analysed variables. The research also involved the performance of the ANOVA GLM factor analysis, verifying whether the selected factors or the interactions of selected factors differentiate stabilometric parameters, the thrust of the forefoot on the ground and the value of the Clarke angle. The level of significance adopted in the statistical analyses was p = 0.05. Calculations were performed using a Dell Statistica 13.1 software programme (Dell Inc., Tulusa, Oklahoma, USA) and a PQStat 1.8 software programme (PQStat Software, Poznań, Poland).