Technical Report - AUTO21

Figure 3.2.1: Box plots showing median age in months per provincerepresented by the middle bar in each box).250.00200.00Child's age in months150.00100.0050.000.00ABBCMBNBNFLNSNTONPEIQCSKProvince__Only 1811 children had their actual weights recorded (see Table 3.2.1) whereasparent’s estimation of the child’s weight was recorded for 2285 children. Table3.2.1 shows the distribution of weight classes for either actual or estimated. Thehighest proportion of children falls in the weight group (40-80] lbs (41.0%, 38.1%for actual and actual/estimated, respectively), while the lowest proportion falls inthe weight group (0-20] lbs (4.2%, 7.9% for actual and actual/estimated weights,respectively).The measures of children’s height differed from the trend of measuring children’sweight.. More children had their actual heights measured than estimated. In fact,there were 1723 children with actual heights and 1240 with estimated heights.53.5% and 50.2% of the children fall in the height group (40-57] inches for actualand actual/estimated respectively (see Table-3.2.1). Anecdotally, parents hadless awareness of their child’s height than they had for their child’s weight.Both for height and weight, the estimated and actual values were highlycorrelated (see Figures 3.2.2 & 3.2.3) and their respective, un-weighted, Pearsoncorrelations are: 0.909 and 0.966. This may suggest using the estimated weightsor heights whenever the actual values of these variables are not available. Theheight scatterplot shows some outliers. The data is correlated within each vehicle11