Lead Measurement. Laboratories A and B made multiple measurements on prepared wastewater effluent specimens to which lead (Pb) had been added in the amount of 1.25 µg/L or 2.5 µg/L. The background lead concentration was low, but not zero. Compare the bias and precision of the two laboratories. Laboratory A Spike = 1.25 1.1 Spike = 2.5 2.8 Laboratory B Spike = 1.25 2.35 Spike = 2.5 5.30
Lead Measurement. Laboratories A and B made multiple measurements on prepared wastewater effluent specimens to which lead (Pb) had been added in the amount of 1.25 µg/L or 2.5 µg/L. The background lead concentration was low, but not zero. Compare the bias and precision of the two laboratories. Laboratory A Spike = 1.25 1.1 Spike = 2.5 2.8 Laboratory B Spike = 1.25 2.35 Spike = 2.5 5.30
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![Lead Measurement. Laboratories A and B made multiple measurements on prepared wastewater
effluent specimens to which lead (Pb) had been added in the amount of 1.25 µg/L or 2.5 µg/L.
The background lead concentration was low, but not zero. Compare the bias and precision
of the two laboratories.
Laboratory A
Spike = 1.25
1.1
2.0
1.3
1.0
1.1
0.8
0.8
0.9
0.8
Spike = 2.5
2.8
3.5
2.3
2.7
2.3
3.1
2.5
2.5
2.5
Laboratory B
Spike = 1.25
2.35
2.86
2.70
2.56
2.88
2.04
2.78
2.16
2.43
Spike = 2.5
5.30
4.72
3.64
5.04
3.62
4.53
4.57
4.27
3.88](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F00828718-2df8-4d22-87de-a2e53e10f924%2Fc3c7b271-511e-4ef9-a187-65337940dc71%2Fib9gh1j_processed.png&w=3840&q=75)
Transcribed Image Text:Lead Measurement. Laboratories A and B made multiple measurements on prepared wastewater
effluent specimens to which lead (Pb) had been added in the amount of 1.25 µg/L or 2.5 µg/L.
The background lead concentration was low, but not zero. Compare the bias and precision
of the two laboratories.
Laboratory A
Spike = 1.25
1.1
2.0
1.3
1.0
1.1
0.8
0.8
0.9
0.8
Spike = 2.5
2.8
3.5
2.3
2.7
2.3
3.1
2.5
2.5
2.5
Laboratory B
Spike = 1.25
2.35
2.86
2.70
2.56
2.88
2.04
2.78
2.16
2.43
Spike = 2.5
5.30
4.72
3.64
5.04
3.62
4.53
4.57
4.27
3.88
Expert Solution
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Step 1
Two laboratories A and B collected data related to wastewater in which lead was added in two quantities - 1.25 and 2.5 respectively.
The observations were recorded in a table.
There was also a low background concentration of lead in the wastewater, but due to the uniform nature of its distribution, it will not effect the measure of bias in the data.
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