Comparison between total stellar mass and bar Sérsic index. Error bars show bootstrap errors on the x-axis and 0.1 dex uncertainties from the calibration in Taylor et al. (2011) on the y-axis. The Spearman’s rank correlation coefficient ρ and the t-value for a null-hypothesis test are given in the top right corner. The results show no indication for a correlation between the two parameters in the given mass range.