sample size


Also found in: Dictionary, Thesaurus, Financial, Acronyms, Encyclopedia, Wikipedia.
Related to sample size: sampling techniques

sample size

(1) A subset of a larger population, selected for investigation to draw conclusions or make estimates about the larger population.
(2) The number of subjects in a clinical trial.
(3) Number of subjects required for primary analysis.
References in periodicals archive ?
Included in the study but not ranked due to sample size are Amica Mutual, Auto Club of Southern California Insurance Group, Kemper, and Safeco Insurance.
In this study, the latter is considered where the estimation of the sample size is based on an acceptable level of effect size "ES", a and power.
Pilot testing found that the decision aid provides a larger sample size than auditor sample size judgments without the aid.
In practice, the concern is how large does a sample size need to be to claim a treatment is a complete success (or failure).
In most cases, the sample size was limited by the number of individuals in the catch.
That we did not exclude in our analyses dogs that have traveled suggests that caution should be used when considering the importance of low prevalence rates or prevalence rates calculated from low sample sizes.
The distribution of the sample multiple correlation coefficient r depends only on the population coefficient R, number of variates M, and the sample size N.
Goodness of fit indexes in confirmatory factor analysis: The effects of sample size.
When one is faced with a sample size under 30, however, a different probability distribution (referred to as the student-t or t probability distribution) is substituted, which recognizes the greater variability intrinsic to smaller sample sizes.
Reduced the pilot sample size of "high-risk" taxpayers from 45,000 to 25,000 for the 2004 filing season.
The first of these provisions is the allowance of the use of a single sample taken from up to three years combined rather than the requirement of three separate annual samples; the provision results in a great reduction in sample size over the combined years.
The sample variation in the estimates of the parameters defining the transformation leads to a rather larger sample size being needed for estimation purposes than would be needed if no transformation were required.