Evaluating the Efficiency of the Δ-Distribution Mean Estimator
- 1 June 1988
- journal article
- research article
- Published by JSTOR in Biometrics
- Vol. 44 (2) , 485-493
- https://doi.org/10.2307/2531861
Abstract
The .DELTA.-distribution has been suggested as a useful model for the distribution of catch-per-tow data from trawl surveys for fish and plankton (Pennington, 1983, Biometrics 39, 281-286). Previously the efficiency of the .DELTA.-distribution mean estimator .cxa..kappa. with respect to the sample mean had been evaluated by using a large-sample approximation for the variance of .cxa..kappa.. The exact form of the variance of .cxa..kappa. is derived here and used to study the efficiency for the small sample sizes typical of trawl surveys. Actual data from a recent trawl surveys are used to assess the expected gains in precision from using .cxa..kappa. in practice.This publication has 1 reference indexed in Scilit:
- Estimating the Size of the Threadfin Shad Population in Bull Shoals Reservoir from Midwater Trawl CatchesTransactions of the American Fisheries Society, 1967