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Updated: Aug 9, 2026

Analysis of Cell Migration within a Three-dimensional Collagen Matrix
Published on: October 5, 2014
The story of the British special migration statistics
Abstract:
"This paper describes a new data set from the 1991 Census called the Special Migration Statistics. Before release for general use by the U.K. social science and geographic community, it was essential to understand and to thoroughly check the data. This paper reports on the structure of the database and the checks carried out to verify its internal and external consistency. Finally, the paper summarises the pattern of migration revealed by the statistics for two illustrative spatial systems: wards in a large northern city and regions in Great Britain." The focus is on internal migration.
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Estimating a population mean requires the samples to be distributed normally. The data should be collected from the randomly selected samples having no sampling bias. The sample size needed to be higher than 30, and most importantly, the population standard deviation should be already known.
In most realistic situations, the population standard deviation is often unknown, but in rare circumstances, when it...

