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Figure 1 | BMC Bioinformatics

Figure 1

From: Improving statistical inference on pathogen densities estimated by quantitative molecular methods: malaria gametocytaemia as a case study

Figure 1

Heteroscedasticity of calibration or standard curves from quantitative nucleic acid sequence-based amplification (QT-NASBA) assays. Panel A depicts the conditional raw residuals of a homoscedastic linear mixed model with a correlated random intercept and slope (the homoscedastic homologue of the selected Model 7 in Table 2) plotted against the fitted time to positivity (TTP). The data points in panel B depict the natural logarithm (ln) of the variance of the residuals presented in panel A grouped by deciles (10-quantiles) of fitted TTP. The solid line and shaded area are for presentation purposes only, representing a linear regression ± 2 standard deviations respectively.

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BMC Bioinformatics

ISSN: 1471-2105

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