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Fig. 3 | BMC Medical Research Methodology

Fig. 3

From: Grouped data with survey revision

Fig. 3

Yearly mean of weekly duration of LTPA. The vertical lines in the figure show the revision time of duration and intensity questions, which are the blue and the dotted red lines, respectively. The orange line shows the annual mean duration, estimated by the midpoint method. The green line shows the annual mean duration estimated by MLE

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