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. 2020 May 15;10(5):855. doi: 10.3390/ani10050855

Table 1.

The descriptive statistics of the K-means and agglomerative clusters of the free-range flocks using daily mean time duration in each zone from 18–22 weeks of age (pre-laying period). CV = coefficient of variation.

Summary Statistics Average Lower Feeder Time (Min/Hen/Day) Average Upper Feeder Time (Min/Hen/Day) Average Nest Box Time (Min/Hen/Day) Average Range Use Time (Min/Hen/Day)
K-Means Agglomerative K-Means Agglomerative K-Means Agglomerative K-Means Agglomerative
Cluster 1 Mean ± SEM 108.7 ± 2.28 88.9 ± 2.45 498.0 ± 4.16 571.8 ± 4.60 71.9 ± 1.37 68.2 ± 1.58 6.18 ± 0.32 4.80 ± 0.36
SD 87.4 76.7 159.7 144.1 52.5 49.3 12.1 11.4
Skewness 0.85 0.99 0.89 0.87 1.41 0.79 3.07 3.88
CV 80.3 0.48 32.1 0.14 73.0 0.44 196.2 19.4
Median 89.7 65.3 458.3 539.6 63.1 60.5 0.01 0.00
N 1470 979 1470 979 1470 979 1470 979
Cluster 2 Mean ± SEM 302.4 ± 1.80 264.1 ± 1.88 143.8 ± 1.57 178.7 ± 1.94 78.1 ± 1.16 72.88 ± 0.89 30.0 ± 0.45 26.59 ± 0.43
SD 106.2 109.9 92.7 114.6 68.4 52.6 26.6 25.4
Skewness −0.31 −0.17 0.42 0.32 3.54 2.64 1.02 1.10
Kurtosis −0.66 −0.436 −0.55 −0.865 18.70 12.2 1.19 1.39
Median 312.1 273.5 132.2 164.9 61.2 61.1 26.1 22.4
N 3473 3501 3473 3501 3473 3501 3473 3501
Cluster 3 Mean ± SEM 648.5 ± 2.50 611.7 ± 2.61 46.3 ± 1.17 55.3 ± 1.11 59.0 ± 1.05 69.1 ± 1.38 26.8 ± 1.20 27.9 ± 0.57
SD 119.8 137.2 56.2 58.5 50.2 72.4 29.6 30.1
Skewness 0.70 0.47 1.80 1.03 2.61 3.57 1.20 1.17
Kurtosis 0.32 0.001 4.89 0.178 11.9 18.5 0.94 0.866
Median 635.1 602.1 26.1 37.0 48.0 51.4 16.9 18.8
N 2301 2764 2301 2764 2301 2764 2301 2764

SD represents standard deviation; SEM represents standard error of the mean.