## 3 Experimental Study
### Experimental Dataset
\begin{table}
\begin{tabular}{c c c c c c c c c c} \hline
**Mail Center** & **Q1** & **Q2** & **Q3** & **Q4** & **Max** & **Avg** & **Stdev** & **95\% CI** & **CV** \\ \hline Mail Center \#1 & 52,842.5 & 120,541.0 & 149,959.0 & 225,370.0 & 225,370 & 104,943.7 & 63,352.7 & 95,096.4-114,790.9 & 0.60 \\ Mail Center \#2 & 2180.0 & 20,477.0 & 29,992.0 & 79,048.0 & 79,048 & 23,705.5 & 17,073.4 & 76,377.3-81,718.7 & 0.72 \\ Mail Center \#3 & 9889.0 & 28,064.0 & 38,370.0 & _77,927.0_ & _77,927_ & 26,459.0 & 16,882.7 & 23,814.6-29,103.4 & 0.64 \\ Mail Center \#4 & 27,063.0 & 47,586.0 & 54,818.0 & 139,060.0 & 139,060.0 & 45,200.8 & 26,463.4 & 40,973.9-49,427.7 & 0.59 \\ Mail Center \#5 & 24,075.5 & 41,184.5 & 51,461.3 & 94,285.0 & 94,285 & 37,884.1 & 22,435.9 & 34,288.6-41,479.6 & 0.59 \\ Mail Center \#6 & 6267.3 & 10,545.0 & 15,723.5 & 29,372.0 & 29,372 & 10,982.2 & 6737.3 & 8405.9-13,558.5 & 0.61 \\ Mail Center \#7 & 25,117.5 & 64,168.0 & 84,739.5 & 135,408.0 & 135,408 & 57,270.0 & 33,229.3 & 52,297.9-62,421.4 & 0.58 \\ Mail Center \#8 & 10,982.0 & 24,748.0 & 34,520.0 & 71,813.0 & 71,813 & 23,914.4 & 15,760.3 & 19,387.5-28,441.3 & 0.66 \\ Mail Center \#9 & 27,461.5 & 58,678.0 & 75,437.5 & 124,475.0 & 124,475.1 & 51,902.1 & 30,383.5 & 47,127.7-56,676.5 & 0.59 \\ Mail Center \#10 & 25,940.0 & 45,000.0 & 58,127.5 & 94,897.0 & 94,897 & 41,943.5 & 24,780.3 & 38,011.5-45,875.5 & 0.59 \\ Mail Center \#11 & 37,859.0 & 70,448.0 & 85,492.8 & 138,841.0 & 138,841 & 63,427.3 & 35,386.0 & 53,950.9-72,903.7 & 0.56 \\ Mail Center \#12 & 40,217.0 & 89,316.0 & 119,860.8 & 237,143.0 & 237,143 & 82,019.7 & 51,102.6 & 73,989.9-90,049.8 & 0.62 \\ Mail Center \#13 & 42,016.8 & 69,175.5 & 95,636.8 & 156,706.0 & 156,706 & 67,975.5 & 51,102.6 & 61,594.2-74,356.8 & 0.75 \\ Mail Center \#14 & 16,935.5 & 30,181.5 & 46,781.3 & 74,552.0 & 74,552 & 31,479.3 & 20,162.7 & 28,226.2-34,732.4 & 0.64 \\ Mail Center \#15 & 12,599.8 & 19,316.0 & 28,208.0 & 48,345.0 & 48,345 & 48,345 & 19,804.8 & 11,208.1 & 17,945.4-21,664.2 & 0.57 \\ Mail Center \#16 & 10,828.0 & 41,718.0 & 62,952.0 & 117,847.0 & 117,847 & 40,518.9 & 28,092.7 & 36,146.4-44,891.4 & 0.69 \\ Mail Center \#17 & 24,916.3 & 68,523.0 & 98,665.5 & 17,951.0 & 17,965.1 & 67,183.7 & 42,668.3 & 60,521.6-73,845.8 & 0.64 \\ Mail Center \#18 & 10,243.3 & 15,970.5 & 25,048.4 & 48,978.0 & 48,978 & 16,187.6 & 10,150.5 & 17,945.4-21,664.2 & 0.63 \\ Mail Center \#19 & 8630.0 & 18,777.0 & 30,69.0 & 70,283.0 & 70,283 & 21,526.0 & 15,927.7 & 18,911.5-24,140.5 & 0.74 \\ Mail Center \#20 & 11,396.8 & 21,525.0 & 29,665.8 & 54,976.0 & 54,976 & 20,651.3 & 12,261.1 & 18,699.4-22,603.2 & 0.59 \\ Mail Center \#21 & 11,008.0 & 20,151.0 & 30,727.0 & 69,885.0 & 69,885 & 21,99,89 & 15,357.4 & 19,473.6-24,446.0 & 0.70 \\ Mail Center \#22 & 25,305.0 & 70,339.0 & 85,875.0 & 151,727.0 & 151,727.7 & 62,182.4 & 38,329.0 & 19,473.6-24,446.0 & 0.62 \\ Mail Center \#23 & 13,141.5 & 24,884.5 & 46,106.0 & 89,609.0 & 89,609 & 29,871.5 & 22,499.3 & 26,265.8-33,477.2 & 0.75 \\ Mail Center \#24 & 7191.8 & 14,144.0 & 20,541.0 & 43,956.0 & 43,956 & 14,001.7 & 9061.1 & 12,529.8-15,473.6 & 0.65 \\ Mail Center \#25 & 40,091.5 & 91,905.0 & 147,942.5 & 222,904.0 & 222,904 & 93,499.4 & 62,742.8 & 83,794.9-03,203.9 & 0.67 \\ \hline \end{tabular}  
Q1–Q4: from the first quartile to the fourth quartile; Max: maximum value; Avg: size value; Stdev: standard deviation; CI: confidence interval; CV: coefficient of variation.  
\end{table} 
Table 1: Summary of datasets peak periods in 25 mail centers. Figure 5: Example of postal parcel data of a mail center.