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| androstenediol, point, gadgets, l glutamine, the zone diet, burning, cardiopathy, scale, tribex 500, accu measurefat loss design n/a, multi vitamin, nutritional supplements, bodymass index, ami accu measure fat tester by accu-fitness, used, bodyfat calculators, measure body fat, body fat monitors, bmi, fattrackgold digital body fat caliper and myotape combo, | The PRESS statistic is defined as where e2(i) is the residual for observation i computed as the difference between the observed value prompt gamma activation analysis and the prediction from a regression model, calibrated on the set of n – 1 observations from which observation i was excluded. The model fitting prompt gamma activation analysis included backward elimination of the independent variables following the same procedure as described above, i.e., prompt gamma activation analysis the PRESS statistic reflects the error of both variable selection procedure and parameter estimation of the final model. The PRESS statistics were calculated using the ipred add-on package (27) within the R system for statistical computing (28) , version 1.9.0 |
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| The final regression model for backward elimination of remaining variables bodyfat calculators was based on six-(men) and eight (women). 3) The cross-validation group was used to test the stability of R2 and was used iteratively for each alternative model until stable results were achieved. All analyses were bodyfat calculators performed using SPSS for Windows 11.5 (SPSS, Chicago, IL). bodyfat calculators Tests for accuracy included mean differences and partial R2. A Bland-Altman analysis (25) was performed to assess the agreement between BFMDXA, BFMNew, BFMDW, and BFMPeterson. Pure error for the cross-validation group as a measure of accuracy of the preliminary prediction equation was calculated as the square root of the sum of squared differences between observed and predicted values divided by the number of subjects in the cross-validation group. The final equations were validated by the predicted residual sum of squares (PRESS) statistic (26) , which is equivalent to "leave-one-out" cross-validation. |
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