Fig. 5

Scatter plot of relationship of max queue lengths between shifts and days following each other. The plots are jittered to avoid over plotting. Queue lengths correlated between shifts except for between night and day shift. Queue lengths also correlated between days (24-h) following each other. a Maximum queue on day and the following evening shift, Spearman’s rank correlation rho = 0.67, p-value < 2.2e-16. b Maximum queue on evening and the following night shift, Spearman’s rank correlation rho = 0.20, p-value = 0.0001. c Maximum queue on night and the following day shift, Spearman’s rank correlation rho = −0.02, p-value = 0.6496. d Arrivals on days following each other, Spearman’s rank correlation rho = 0.23, p-value = 7.498e-06