Testing of industrial products - Aggregates for construction

Data obtained in the cross-testing experiments on the Methylene Blue test

Notes.? = straggler (significant at the 5% level). ?? = outlier (significant at the 1% level).


Table 1. Data as reported by the participants (MB units).
Laboratory codeLevel 1 Level 2Level 3
letternumberTest portion 1Test portion 2 Test portion 1Test portion 2 Test portion 1Test portion 2
A23.503.27 1.741.851.231.22
B43.113.57 1.511.560.981.03
C63.793.79 1.461.461.051.07
D83.433.30 1.221.431.180.86
E274.454.65 2.672.531.311.35
F302.84-.-- 1.27-.--0.72-.--
G313.263.41 1.891.760.870.81
H323.483.36 1.501.500.990.86
I343.973.88 1.781.860.911.07
J352.602.57 1.401.240.800.75
K542.943.19 1.701.791.111.03
L702.802.62 1.451.371.100.96
M963.113.20 2.222.221.251.24
N1123.863.50 1.661.680.900.88
O1282.332.24 1.241.240.740.75
P1294.78 ??5.87 ?? 2.802.681.431.74
Q1472.862.87 1.641.691.161.17
R1493.002.83 1.451.510.730.89
S1854.684.47 1.721.781.031.07
T1902.752.95 1.451.550.850.85
U2044.214.04 1.731.701.001.15
V2052.993.01 1.481.471.050.96
W2163.643.74 1.701.751.201.00
X2183.663.61 1.932.011.401.36
Y2244.154.09 1.872.001.031.11
Z2483.153.22 1.661.700.750.77
a2510.74 ?0.60 ? 1.101.250.600.60
b2525.555.20 2.65 ?2.30 ?1.501.20
c2602.442.37 1.081.070.510.75
d2743.213.18 2.08 ?1.74 ?0.971.08
e3102.953.00 1.311.410.820.81
f3124.024.02 0.750.750.650.65
g953.613.22 1.451.540.940.85
h1062.592.49 1.091.230.690.75
Average3.36 1.640.98