Epidemiologic analysis with a programmable calculator (NIH Publication No. 79-1649). Bethesda, MD: U.S: Department of Health, Education, and Welfare, Public Health Service, National Institutes of Health; 1979. Vandenbroucke J. A shortcut method for calculating the 95 percent confidence interval...
© 2016 Springer International Publishing Switzerland About this chapter Cite this chapter Cleophas, T.J., Zwinderman, A.H. (2016). Sample Size Calculations. In: Clinical Data Analysis on a Pocket Calculator. Springer, Cham. https://doi.org/10.1007/978-3-319-27104-0_12 Download citation ....
sample size computation methodssystem requirementsThe Sample Size Software implements many of the sample size computation methods discussed in this book. The primary function of Sample Size Software is as a sample size calculator, which can be accessed under Sample Size Calculator in the main menu, ...
- 《American Journal of Epidemiology》 被引量: 21发表: 1989年 SPCalc: A web-based calculator for sample size and power calculations in micro-array studies Calculation of the appropriate sample size in planning microarray studies is important because sample collection can be expensive and time-consu...
Campbell MK, Thomson S, Ramsay CR, MacLennan GS, Grimshaw JM: Sample size calculator for cluster randomised trials. Computers in Biology and Medicine. 2004, 34: 113-125. 10.1016/S0010-4825(03)00039-8. Article PubMed Google Scholar Donner A, Birkett N, Buck C: Randomization by cluster:...
Sample size calculator for cluster randomized trials Computers in Biology and Medicine (2004) S. McKinlay Cost efficient designs for cluster unit trials Preventive Medicine (1994) D.J. Bauer et al. Evaluating group-based interventions when control participants are ungrouped Multivariate Behavioral Resear...
Power Sample Size Welcome! PowerandSample Size.com Free, Online, Easy-to-Use Power and Sample Size Calculators no java applets, plugins, registration, or downloads ... just free Go Straight to the Calculators » Hypothesized Mean Sample Size...
For an example of population vs sample, researchers might be studying U.S. college students. This population contains about 19 million students and is too large and geographically dispersed to study fully. However, researchers can draw a subset of a manageable size to learn about its characteristi...
A larger sample size provides Bonett confi- dence intervals with greater protection against nonnormality. Example 9: Bonett confidence interval for normal data We will repeat example 8 and construct a Bonett confidence interval for the standard deviation by specifying the bonett option. The results ...
Conclusions Clustering among outcomes measured on twins should be taken into account in sample size calculations to obtain the desired power. Our ICC estimates and sample size calculator will be useful for designing future trials that include twins. Publication of additional ICC s is needed to ...