结构推理 测得30个地区的4个有关生殖健康指标得分，均为越大越好，见下图。用主成分法作因子分析，特征值的累计百分率为：1个因子84.3899，2个因子91.5 815，3个因子96.6904，4个因子100.0000，因而取1个因子。请对此结论作出评价。 31个地区的4个有关生殖健康指标的得分 地区 168.7778.469 8.1887.13 278.4886.2580.8498.95 359.9077.5773.4878.49 45 3.1063.7773.315 2.12 551.8966.2657.3871.78 674.7484.6481.1675.23 765 9681.367 3.1379.84 864.7268.6677.8772.00 965.2477.9992.5592.62 106 8.188 7.1877.737 6.15 1166.1290.5976.2672.30 126 6.1290 5976.2672.30 1356.0668 5267.7873.89 1463.9861.1658.8564.65 1554.1669.4455.5566.21 166 7.1595.2080.2282.53 1752.5873 6571.0076.68 1857.806 5.156 3.1371.40 19S 7.1679.5859.6062.64 2046.7667.7061.4969.31 2135 7560.1046.5664.47 2245.5950.5149.6566.80 2364.9767.3467.8870.24 2445.0822.1321.5841.11 2546.2533 7728.7371.24 2625.0313.7236.6630.00 2753.9079.8061.3469.64 2851.5140.6833.7845.87 2933.6832.7520.6159.29 3046.6548.3948.2163.51