Confidence bounds for normal and lognormal distribution coefficients of variation

Steve P. Verrill

doi:10.2737/FPL-RP-609

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Confidence bounds for normal and lognormal distribution coefficients of variation

Informally Refereed

Authors:

Steve P. Verrill

Year:

2003

Type:

Research Paper

Station:

Forest Products Laboratory

DOI:

https://doi.org/10.2737/FPL-RP-609

Source:

Res. Pap. FPL-RP-609. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory: 13 pages

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Abstract

This paper compares the so-called exact approach for obtaining confidence intervals on normal distribution coefficients of variation to approximate methods. Approximate approaches were found to perform less well than the exact approach for large coefficients of variation and small sample sizes. Web-based computer programs are described for calculating confidence intervals on coefficients of variation for normally and lognormally distributed data.

Keywords

Noncentral T, noise to signal ratio, variability, coefficient of variation, confidence bounds, normal, lognormal

Citation

Verrill, Steve. 2003. Confidence bounds for normal and lognormal distribution coefficients of variation. Res. Pap. FPL-RP-609. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory: 13 pages