3.2009年在某农村地区抽样测得200名 backsim 12 岁男性儿童的身高值(cm),每个年龄段50名-|||-男孩,数据如表 https:/img.cdnjtzy.com/zyb_f704be7ca38f89f7d3c1a6eee0ebea62.jpg-3-|||-表 https:/img.cdnjtzy.com/zyb_f704be7ca38f89f7d3c1a6eee0ebea62.jpg-3lt 0 名 backsim 12 岁男性儿童的身高值(cm)-|||-9岁-|||-10岁-|||-11岁-|||-130.6 125.4 119.2 114.0 131.9 122.6 129.1 124.4 129.8 116.2-|||-113.7 115.5 119.3 124.1 130.1 125.8 130.1 127.0 130.1 119.6-|||-126.0 125.0 130.0 132.3 130.2 123.2 120.5 118.8 118.5 108.1-|||-127.0 138.7 124.2 124.8 120.3 125.8 116.0 114.5 121.3 127.0-|||-122.8 123.3 128.5 120.8 122.4 123.1 117.6 121.0 120.6 119.8-|||-133.5 124.0 122.2 118.4 133.7 129.8 129.5 128.5 130.2 123.7-|||-119.0 132.0 127.0 122.0 133.1 129.2 131.0 127.0 128.0 141.6-|||-137.0 133.8 124.3 142.5 128.6 133.3 131.7 122.5 131.7 138.5-|||-131.0 125.0 121.8 130.4 128.0 121.0 128.7 123.2 121.6 129.7-|||-130.6 132.9 123.6 134.6 116.7 135.3 131.8 120.0 132.8 117.4-|||-139.2 124.0 124.8 131.6 137.0 128.0 129.0 139.0 142.6 140.0-|||-138.0 128.0 139.0 140.7 129.1 143.9 139.8 130.0 130.0 133.5-|||-127.0 127.8 142.6 132.7 129.8 140.0 126.0 127.3 131.8 121.2-|||-125.7 131.7 126.6 137.4 136.1 130.7 129.3 133.6 133.3 135.3-|||-131.0 141.1 129.1 130.5 122.0 138.2 131.3 136.0 139.7 131.2-|||-143.2 133.6 127.0 143.0 134.8 141.3 137.3 136.5 136.1 134.8-|||-140.2 141.0 147.0 143.2 141.0 138.1 136.2 130.1 136.5 127.6-|||-134.2 142.0 135.3 134.0 145.1 146.0 137.0 128.0 130.6 135.1-|||-128.3 127.6 143.5 141.0 140.1 144.5 135.0 134.6 145.5 134.0-|||-135.5 144.6 127.4 139.8 139.0 132.5 133.6 143.8 135.3 135.1-|||-(1)编制频数分布表绘制频数分布图,并简述数据分布特征。-|||-(2)计算适当的集中位置和变异程度指标,并分析随年龄的增长男孩身高平均水平的变化-|||-情况,以及各年龄男孩身高的变异程度。