NIST StRD Dataset Archive
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AtmWtAg
Dataset
Additional Information

Dataset
Name:

AtmWtAg

Procedure: Analysis of Variance
Certification Method & Definitions

Data: 1 Factor
2 Treatments
24 Replicates/Cell
48 Observations
7 Constant Leading Digits
Average Level of Difficulty
Observed Data

Model: 3 Parameters ((mu, tau(1), tau(2)))
y(ij) = mu + tau(i) + e(ij)



The atomic weight of a reference sample of silver was measured at NIST using two nearly identical mass spectrometers. This project was undertaken in conjunction with the redetermination of the Faraday constant. Accurate knowledge of the atomic weight of silver, besides being important in its own right, was needed to check the consistency of different computations of the Faraday constant which theoretically should yield identical results. The dataset given here is a balanced subset of the original data which was used to determine the atomic weight of silver.