A two-sample z-test for population means compares two population means. It is appropriate when the population standard deviations are known and the sample sizes are large. This web calculator conducts ...
The Annals of Statistics, Vol. 48, No. 3 (June 2020), pp. 1304-1328 (25 pages) We propose a two-sample test for high-dimensional means that requires neither distributional nor correlational ...
COVID-19 testing is becoming more common in the UK as, along with mass vaccinations, it helps to open up society at a time when restrictions are easing. A university is trialling the use of saliva ...
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