All statistical analyses were performed using SPSS 15.0 (
SPSS, Inc., Chicago, IL, USA).
Data were expressed as percentages, and statistical analysis was done using [chi square] test using Statistical Package for Social Sciences (
SPSS, Inc., version 17.0).
We report means (6 SEE) by year, sex, and age (
SPSS, Inc., 2002).
The Sample Power 2.0 (
SPSS, Inc., Chicago, Ill) software program was used to calculate a sample size based on our goal of recognizing a correct answer (call 911) proportion significantly different from 50% in the population.
SPSS version 11.0 (
SPSS, Inc., Chicago, IL, USA) was used for statistical analysis.
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For each preservative, data from all larval ages and shrinkage treatments were pooled and backward stepwise regression (
SPSS, Inc., 1998) was used to determine which variables produced the best model for estimating live SL.