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Plus, as significant difference in age groups was found between respondents and non-respondents, to further estimate and adjust the effect of age, we conducted sample weights and weighted factor analysis based on 2011 census data in NL.
The system provides a factor of 150 reduction in sample weights and extraction solvent volumes and provides statistically similar recoveries to the conventional method with a pyrene detection limit of 1 ppm (0.03 μg absolute detection limit).
Estimations using sample weights and 80 replicates for standard errors.
Analysis was by means of logistic and ordinary least-squares regression, with sample weights and design effects taken into account.
Linear regression, in which sample weights and design effects were taken into account, was used for the final models.
I apply NLSY79 sample weights and cluster standard errors around the lagged state.
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SHLPME parameters including nature of extracting solvent, headspace volume and design, extraction time, sample weight and microdrop volume were optimized.
Where SSW, SW, and OSW are the swollen sample weight, sample weight, and oil-absorbed sample weight, respectively [52].
The reported sample sizes differ from the original (n = 44,634) due to sample weighting and lagging.
Absorbance was normalized to the sample weight and ratio between gene transferred and intact muscle samples was calculated.
Dry solid mass of samples was calculated based on the sample weight and moisture.
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