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Fig. 8 | BMC Medical Research Methodology

Fig. 8

From: Two-stage sampling in the estimation of growth parameters and percentile norms: sample weights versus auxiliary variable estimation

Fig. 8

Centile-curves for the Narrative Recall test based on the whole population (n=6,411). The bold curve in the middle depicts median centile values across age. The thin lines are the 3rd, 10th, 25th, 75th, 90th and 97th centile-curves. The top left panel represents a 3nd degree polynomial in age. The top-right, bottom-left and bottom-right panels use a 5th, a 6th, and a 7th degree polynomial, respectively

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