NQuery Sample Size Software: Difference between revisions

Revision as of 20:46, 28 June 2022

Revision as of 20:48, 28 June 2022

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[[Janet D. Elashoff|Janet Dixon Elashoff]] is a now-retired American statistician and daughter of the mathematician and statistician, [[Wilfrid Dixon|Wilfrid Joseph Dixon]], creator of BMDP. J. Elashoff is also the retired Director of the Division of Biostatistics, [[Cedars-Sinai Medical Center]]. While at [[University of California, Los Angeles|UCLA]] and Cedars-Sinai during the 1990s, she wrote the program nQuery Sample Size Software (named nQuery Advisor back then). This software quickly became widely used to estimate the sample size requirements for pharmaceutical trials. She joined the company, Statistical Solutions LLC, to commercialize it.<ref name=cherfriis>{{citation|title=Introductory Biostatistics for the Health Sciences: Modern Applications Including Bootstrap|series=Wiley series in probability and statistics|first1=Michael R.|last1=Chernick|first2=Robert H.|last2=Friis|publisher=John Wiley & Sons|year=2003|isbn=9780471458654|page=360|url=https://books.google.com/books?id=QRwuz6yA97oC&pg=PA360}}</ref>

== Frequentist and Bayesian statistics ==

==nQuery featured in scientific journals ==

{{Puffery|date=November 2021}}<!-- All this is showing that this word is popular in searches. It doesn't show that anything significant is actually discussed in these articles or how many articles are in peer review journals or how many conclusions have been invalidated by other articles. -->

As of May 2022, there are 8,250 published scientific studies, which are available to the public through [[Google Scholar|Google Scholar]], that feature nQuery. The U.S. [[National Institutes of Health]] Library lists over 895 published studies that utilized nQuery for sample size calculation during clinical trial design.

== Frequentist and Bayesian statistics ==

nQuery allows researchers to apply both [[Frequentist inference|frequentist]] and [[Bayesian inference|Bayesian]] statistics to calculate the appropriate sample size for their study.<ref>{{Cite web | url=https://www.statsols.com/nquery/sample-size-procedures | title=What sample size and power analysis procedures you get in nQuery &#124; Sample Size Software &#124; Power Analysis Software}}</ref>