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Rollingstock in Victoria has used air braking since tests of continuous train brakes were carried out in 1884.
It was a time of improved train safety, with the first interlocking of railway signalling to protect trains provided in 1874, and tests of continuous train brakes carried out in 1884.
At baseline, groups were compared using t tests of continuous variables and by Chi square tests for categorical data.
The Wilcoxon rank-sum test or Kruskall-Wallis test was used, as appropriate, for tests of continuous data.
Groups of patients were compared by using the unpaired Student's t tests for continuous variables with a Gaussian distribution, the Mann-Whitney test for nonparametric tests of continuous variables without a Gaussian distribution, and Fisher's exact test for proportions.
When comparing a characteristic (e.g. outcome) between two groups, tests of continuous (as opposed to categorical) data that assume parametric (as opposed to non-parametric) distributions are the most powerful.
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Unpaired t-test was used for the testing of continuous data and Fisher's exact test for dichotomous data.
We successfully completed the testing of continuous operation from 12 June to 18 September 2012, with a single frequency at 10.01 Hz and frequency modulation from 10 to 15 Hz.
A novel experimental large-scale test set-up is described which allows the testing of continuous, longitudinally restrained, reinforced concrete slab strips exposed to a simulated accidental failure of the central support and subsequent vertical loading until collapse.
It is shown that tensile testing of continuous fibre reinforced composite specimens with varying gauge lengths above the matrix melting temperature provides a method for the measurement of fibre damage within the composite.
Comparison of results of patients with and without liver disease was done using t-tests of continuous variables and Fisher's exact test or x2 for categoric measures.
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