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8 Critical Care February 2003 Vol 7 No 1 Whitley and Ball An erratum to Statistics review 2: Samples and populations, by Elise Whitley and Jonathan Ball. In the original version of this article [1], the word ‘binomial’ was accidentally replaced with ‘binary’ in the fourth paragraph. The fourth paragraph should have read as follows: ‘There are many other theoretical distributions that may be encountered in medical data, for example Binomial or Poisson [2], but the Normal distribution is the most common. It is additionally important because it has many useful properties and is central to many statistical techniques. In fact, it is not uncommon for other distributions to tend toward the Normal distribution as the sample size increases, meaning that it is often possible to use a Normal approximation. This is the case with both the Binomial and Poisson distributions.’ Reference 1. Whitley E, Ball J: Statistics review 2: Samples and populations. Crit Care 2002, 6:143-148. Erratum Statistics review 2: Samples and populations Elise Whitley 1 and Jonathan Ball 2 1 Lecturer in Medical Statistics, University of Bristol, UK 2 Lecturer in Intensive Care Medicine, St George’s Hospital Medical School, London, UK Correspondence: Editorial Office, Critical Care, [email protected] Published online: 13 December 2002 Critical Care 2003, 7:8 (DOI 10.1186/cc1867) This article is online at http://ccforum.com/content/7/1/8 © 2003 BioMed Central Ltd (Print ISSN 1364-8535; Online ISSN 1466-609X)

Erratum to: Statistics review 2: Samples and populations

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Critical Care February 2003 Vol 7 No 1 Whitley and Ball

An erratum to Statistics review 2: Samples and populations,by Elise Whitley and Jonathan Ball.

In the original version of this article [1], the word ‘binomial’was accidentally replaced with ‘binary’ in the fourthparagraph. The fourth paragraph should have read as follows:

‘There are many other theoretical distributions thatmay be encountered in medical data, for exampleBinomial or Poisson [2], but the Normal distribution isthe most common. It is additionally important becauseit has many useful properties and is central to manystatistical techniques. In fact, it is not uncommon forother distributions to tend toward the Normaldistribution as the sample size increases, meaningthat it is often possible to use a Normal approximation.This is the case with both the Binomial and Poissondistributions.’

Reference1. Whitley E, Ball J: Statistics review 2: Samples and populations.

Crit Care 2002, 6:143-148.

ErratumStatistics review 2: Samples and populationsElise Whitley1 and Jonathan Ball2

1Lecturer in Medical Statistics, University of Bristol, UK2Lecturer in Intensive Care Medicine, St George’s Hospital Medical School, London, UK

Correspondence: Editorial Office, Critical Care, [email protected]

Published online: 13 December 2002 Critical Care 2003, 7:8 (DOI 10.1186/cc1867)This article is online at http://ccforum.com/content/7/1/8© 2003 BioMed Central Ltd (Print ISSN 1364-8535; Online ISSN 1466-609X)