Table S1: Exploratory Data Analysis of the Enantiomeric Composition of Theanine According

Table S1: Exploratory data analysis of the enantiomeric composition of theanine according to the tea type and the country of provenance. Stem-and-leaf plot technique was used to perform the followed descriptive statistics.

Descriptives
Sample type / Statistic / Std. Error
D-Theanine (%) / Black tea / Mean / 2.1800 / 0.32810
95% ConfidenceIntervalforMean / LowerBound / 1.4042
UpperBound / 2.9558
5% trimmedMean / 2.1222
Median / 2.0000
Variance / 0.861
Std. Deviation / 0.92801
Minimum / 1.10
Maximum / 4.30
Range / 3.20
Interquartile Range / 0.44
Skewness / 1.940 / 0.752
Kurtosis / 5.088 / 1.481
Final black tea / Mean / 1.9031 / 0.38470
95% ConfidenceIntervalforMean / LowerBound / 1.0649
UpperBound / 2.7413
5% trimmedMean / 1.7506
Median / 1.2700
Variance / 1.924
Std. Deviation / 1.38706
Minimum / 1.02
Maximum / 5.53
Range / 4.51
Interquartile Range / 1.24
Skewness / 1.941 / 0.616
Kurtosis / 3.160 / 1.191
Green tea / Mean / 0.9386 / 0.28771
95% ConfidenceIntervalforMean / LowerBound / 0.2346
UpperBound / 1.6426
5% trimmedMean / 0.9340
Median / 0.9100
Variance / 0.579
Std. Deviation / 0.76121
Minimum / 0.00
Maximum / 1.96
Range / 1.96
Interquartile Range / 1.63
Skewness / -0.109 / 0.794
Kurtosis / -1.378 / 1.587
Instant tea / Mean / 13.5867 / 5.38893
95% ConfidenceIntervalforMean / LowerBound / 1.7257
UpperBound / 25.4476
5% trimmedMean / 12.1846
Median / 2.5450
Variance / 348.486
Std. Deviation / 18.66779
Minimum / 0.61
Maximum / 51.80
Range / 51.19
Interquartile Range / 23.88
Skewness / 1.308 / 0.637
Kurtosis / 0.321 / 1.232
Oolong tea / Mean / 2.2400 / 1.30794
95% ConfidenceIntervalforMean / LowerBound / -3.3876
UpperBound / 7.8676
5% trimmedMean
Median / 2.1900
Variance / 5.132
Std. Deviation / 2.26541
Minimum / 0.00
Maximum / 4.53
Range / 4.53
Interquartile Range
Skewness / 0.099 / 1.225
Kurtosis
White tea / Mean / 0.1200 / 0.12000
95% ConfidenceIntervalforMean / LowerBound / -0.1885
UpperBound / 0.4285
5% trimmedMean / 0.0933
Median / 0.0000
Variance / 0.086
Std. Deviation / 0.29394
Minimum / 0.00
Maximum / 0.72
Range / 0.72
Interquartile Range / 0.18
Skewness / 2.449 / 0.845
Kurtosis / 6.000 / 1.741
Withered leaves / Mean / 1.7450 / 0.71500
95% ConfidenceIntervalforMean / LowerBound / -7.3399
UpperBound / 10.8299
5% trimmedMean
Median / 1.7450
Variance / 1.022
Std. Deviation / 1.01116
Minimum / 1.03
Maximum / 2.46
Range / 1.43
Interquartile Range
Skewness
Kurtosis
L-Theanine (mg/100g) / Black tea / Mean / 0.5100 / 0.05701
95% ConfidenceIntervalforMean / LowerBound / 0.3752
UpperBound / 0.6448
5% trimmedMean / 0.5056
Median / 0.4950
Variance / 0.026
Std. Deviation / 0.16125
Minimum / 0.27
Maximum / 0.83
Range / 0.56
Interquartile Range / 0.15
Skewness / 0.834 / 0.752
Kurtosis / 2.169 / 1.481
Final black tea / Mean / 1.1538 / 0.11404
95% ConfidenceIntervalforMean / LowerBound / 0.9054
UpperBound / 1.4023
5% trimmedMean / 1.1659
Median / 1.2700
Variance / 0.169
Std. Deviation / 0.41119
Minimum / 0.42
Maximum / 1.67
Range / 1.25
Interquartile Range / 0.63
Skewness / -0.945 / 0.616
Kurtosis / -0.415 / 1.191
Green leaves / Mean / 1.1967 / 0.24113
95% ConfidenceIntervalforMean / LowerBound / 0.1592
UpperBound / 2.2342
5% trimmedMean
Median / 1.0400
Variance / 0.174
Std. Deviation / 0.41765
Minimum / 0.88
Maximum / 1.67
Range / 0.79
Interquartile Range
Skewness / 1.450 / 1.225
Kurtosis
Green tea / Mean / 1.0129 / 0.24244
95% ConfidenceIntervalforMean / LowerBound / 0.4196
UpperBound / 1.6061
5% trimmedMean / .9782
Median / 1.0400
Variance / 0.411
Std. Deviation / 0.64142
Minimum / 0.45
Maximum / 2.20
Range / 1.75
Interquartile Range / 0.94
Skewness / 1.090 / 0.794
Kurtosis / 0.894 / 1.587
Instant tea / Mean / 1.5550 / 0.37643
95% ConfidenceIntervalforMean / LowerBound / 0.7265
UpperBound / 2.3835
5% trimmedMean / 1.5228
Median / 1.7300
Variance / 1.700
Std. Deviation / 1.30400
Minimum / 0.05
Maximum / 3.64
Range / 3.59
Interquartile Range / 2.71
Skewness / 0.227 / 0.637
Kurtosis / -1.349 / 1.232
Oolong tea / Mean / 0.3233 / 0.06333
95% ConfidenceIntervalforMean / LowerBound / 0.0508
UpperBound / 0.5958
5% trimmedMean
Median / 0.3600
Variance / 0.012
Std. Deviation / 0.10970
Minimum / 0.20
Maximum / 0.41
Range / 0.21
Interquartile Range
Skewness / -1.336 / 1.225
Kurtosis
White tea / Mean / 1.5367 / 0.26271
95% ConfidenceIntervalforMean / LowerBound / 0.8613
UpperBound / 2.2120
5% trimmedMean / 1.5291
Median / 1.3700
Variance / 0.414
Std. Deviation / 0.64351
Minimum / 0.89
Maximum / 2.32
Range / 1.43
Interquartile Range / 1.34
Skewness / 0.454 / 0.845
Kurtosis / -2.191 / 1.741
Withered leaves / Mean / 0.5550 / 0.09500
95% ConfidenceIntervalforMean / LowerBound / -0.6521
UpperBound / 1.7621
5% trimmedMean
Median / 0.5550
Variance / 0.018
Std. Deviation / 0.13435
Minimum / 0.46
Maximum / 0.65
Range / 0.19
Interquartile Range
Skewness
Kurtosis
Deskriptives
Source / Statistic / Std. Error
D-Theanine (%) / Argentina / Mean / 19.3350 / 10.12060
95% Confidence Interval for Mean / Lower Bound / -12.8733
UpperBound / 51.5433
5% trimmedMean / 18.8250
Median / 14.7450
Variance / 409.707
Std. Deviation / 20.24121
Minimum / 2.40
Maximum / 45.45
Range / 43.05
Interquartile Range / 37.51
Skewness / 0.784 / 1.014
Kurtosis / -1.592 / 2.619
China / Mean / 0.6907 / 0.22546
95% ConfidenceIntervalforMean / LowerBound / 0.2071
UpperBound / 1.1742
5% trimmedMean / 0.6180
Median / 0.0000
Variance / 0.763
Std. Deviation / 0.87322
Minimum / 0.00
Maximum / 2.69
Range / 2.69
Interquartile Range / 1.23
Skewness / 1.004 / 0.580
Kurtosis / 0.162 / 1.121
India / Mean / 1.5229 / 0.29121
95% ConfidenceIntervalforMean / LowerBound / 0.9154
UpperBound / 2.1303
5% trimmedMean / 1.3896
Median / 1.2100
Variance / 1.781
Std. Deviation / 1.33451
Minimum / 0.00
Maximum / 5.53
Range / 5.53
Interquartile Range / 0.85
Skewness / 1.542 / 0.501
Kurtosis / 3.155 / 0.972
Japan / Mean / 1.0933 / 0.27278
95% ConfidenceIntervalforMean / LowerBound / -0.0804
UpperBound / 2.2670
5% trimmedMean
Median / 0.9100
Variance / 0.223
Std. Deviation / 0.47248
Minimum / 0.74
Maximum / 1.63
Range / 0.89
Interquartile Range
Skewness / 1.483 / 1.225
Kurtosis
Sri Lanka / Mean / 1.8780 / 0.21046
95% ConfidenceIntervalforMean / LowerBound / 1.2937
UpperBound / 2.4623
5% trimmedMean / 1.9017
Median / 2.0700
Variance / 0.221
Std. Deviation / 0.47061
Minimum / 1.10
Maximum / 2.23
Range / 1.13
Interquartile Range / 0.78
Skewness / -1.537 / 0.913
Kurtosis / 2.075 / 2.000
unknown / Mean / 16.7300 / 9.82689
95% ConfidenceIntervalforMean / LowerBound / -10.5538
UpperBound / 44.0138
5% trimmedMean / 15.6772
Median / 5.5600
Variance / 482.839
Std. Deviation / 21.97359
Minimum / 0.61
Maximum / 51.80
Range / 51.19
Interquartile Range / 37.57
Skewness / 1.339 / 0.913
Kurtosis / 0.918 / 2.000
L-Theanine (mg/100g) / Argentine / Mean / 0.5325 / 0.37520
95% ConfidenceIntervalforMean / LowerBound / -0.6615
UpperBound / 1.7265
5% trimmedMean / 0.4972
Median / 0.2150
Variance / 0.563
Std. Deviation / 0.75039
Minimum / 0.05
Maximum / 1.65
Range / 1.60
Interquartile Range / 1.23
Skewness / 1.915 / 1.014
Kurtosis / 3.717 / 2.619
China / Mean / 1.5620 / 0.24417
95% ConfidenceIntervalforMean / LowerBound / 1.0383
UpperBound / 2.0857
5% trimmedMean / 1.5561
Median / 1.6000
Variance / 0.894
Std. Deviation / 0.94568
Minimum / 0.06
Maximum / 3.17
Range / 3.11
Interquartile Range / 1.40
Skewness / 0.206 / .580
Kurtosis / -0.836 / 1.121
India / Mean / 1.0852 / 0.09397
95% ConfidenceIntervalforMean / LowerBound / 0.8892
UpperBound / 1.2813
5% trimmedMean / 1.0896
Median / 1.1600
Variance / 0.185
Std. Deviation / 0.43063
Minimum / 0.42
Maximum / 1.67
Range / 1.25
Interquartile Range / 0.82
Skewness / -0.221 / 0.501
Kurtosis / -1.365 / 0.972
Japan / Mean / 0.9733 / 0.27479
95% ConfidenceIntervalforMean / LowerBound / -0.2090
UpperBound / 2.1557
5% trimmedMean
Median / 1.0600
Variance / 0.227
Std. Deviation / 0.47596
Minimum / 0.46
Maximum / 1.40
Range / 0.94
Interquartile Range
Skewness / -0.792 / 1.225
Kurtosis
Sri Lanka / Mean / 0.4780 / 0.02289
95% ConfidenceIntervalforMean / LowerBound / 0.4144
UpperBound / 0.5416
5% trimmedMean / 0.4778
Median / 0.4700
Variance / 0.003
Std. Deviation / 0.05119
Minimum / 0.42
Maximum / 0.54
Range / 0.12
Interquartile Range / 0.10
Skewness / 0.192 / 0.913
Kurtosis / -2.301 / 2.000
unknown / Mean / 1.3640 / 0.67627
95% ConfidenceIntervalforMean / LowerBound / -0.5136
UpperBound / 3.2416
5% trimmedMean / 1.3083
Median / 0.8500
Variance / 2.287
Std. Deviation / 1.51218
Minimum / 0.09
Maximum / 3.64
Range / 3.55
Interquartile Range / 2.77
Skewness / 0.979 / 0.913
Kurtosis / -0.310 / 2.000