Table 1.

Results of the upper-tailed Wilcoxon signed-rank test applied to nonparametric data distribution for April and May and one-sample t-test for parametric distribution for June and July (upper-tailed tests; p < 0.05).

Test	Upper-Tailed Wilcoxon Signed-Rank Test (Nonparametric Test)		Upper-Tailed One-Sample t-Test (Parametric Test)
Month	April	May	June	July
No of observations (Years 2010–2019)	11	11	11	11
Min.	0.268	0.268	0.322	0.334
Max.	0.424	0.413	0.407	0.412
Observed median/mean Mo	0.388	0.371	0.372	0.359
Std. deviation σ	0.043	0.038	0.026	0.022
Theoretical median/mean for 2020 Mt	0.270	0.270	0.320	0.340
Difference Mo–Mt	0.118	0.101	0.052	0.019
95% confidence interval on the median/mean	[0.378; +∞)	[0.364; +∞)	[0.358; + ∞)	[0.347; +∞)
V	65	65
Z	2.801	2.801
t (Critical value)	1.645	1.645	1.812	1.812
t (Observed value)			6.721	2.908
df	10	10	10	10
p-value (one-tailed)	0.003	0.003	<0.001	0.008
Change in the consultation rate *	66.93	70.31	85.35	94.13

* The change in the consultation rate is expressed as a percentage of the mean value for the period 2010–2019; Bold number: significance level of the analysis.