第1页共8页编号：时间：2021年x月x日书山有路勤为径，学海无涯苦作舟页码：第1页共8页某青年女装十三年中每个季度的销售额及其相关影响因素的数据如表3-1所示，取前十二年的数据建立数学模型，其中购买力是指人均购买的能力，单位：元；文化程度中1代表初中文凭，2代表高中文凭，3代表大学以上文凭；生产状况中0代表稳步生产，1代表加班。用多元线性回归法进行预测，求出其数学模型，并进行误差及精度检验。表3-1销售数据和影响因素的数据时间（t）季度(X1)男女比例(X3)购买力(X2)人均购买数(X4)文化程度(X5)生产状况(X6)人口数(X7)销售额Y12345678910111213141516171819202122199312341994123419951234199612341997123419981212121112111099109181211111110881010151635030731830430242945444045539013335035138336038334030240045511319888888888884888888888461111111111211111111131000000000010000000001116513015015014019822021522519011516515317517517016014015022595953017.603043.542094.352809.843274.803163.282114.313024.573327.483493.482439.933490.793685.083661.232378.433459.553849.633701.182642.383585.524078.663907.06第2页共8页第1页共8页编号：时间：2021年x月x日书山有路勤为径，学海无涯苦作舟页码：第2页共8页2324252627282930313233343536373839404142434445464748495051523419991234200012342001123420021234200312342004123420051234161615211815181315141514915161419201316161616121214981112199200979711010710412119936030731894971401139897232225250250232350400351262360290380664444446888.44444666668888484113222221111.31312111111111211111111111000.11111111110000101978588468790951139021520021093889095.48100105100881001651751531451632431902828.464089.504339.614148.602916.454084.644242.423997.582881.014036.234360.334360.533172.184223.764690.484694.483342.354577.634965.465026.053470.244525.945258.715189.583596.763881.605349.375261.713655.125043.65第3页共8页第2页共8页编号：时间：2021年x月x日书山有路勤为径，学海无涯苦作舟页码：第3页共8页其数学模型为：Y=2332.94405+161.348691×X1-0.0531439×X2（3-15）表3-3预测值及其它参数年份销售额Y预测值^YY−¯YY−^Y^Y−¯YX1−¯X1X2−¯X2199312341994123419951234199612341997123419981234199913017.63043.542094.352809.843274.83163.282114.313024.573327.483493.482439.933490.793685.083661.232378.433459.553849.633701.182642.383585.524078.663907.062828.464089.54339.612798.392800.6752800.092800.8342962.2892955.542954.2112954.9553115.5073118.9613132.6193121.0873282.3833280.6823281.9043280.6823444.3163446.3353441.1273438.2043617.7283613.2113613.1583613.1053779.927-672.88-646.94-1596.1-880.64-415.68-527.2-1576.2-665.91-363-197-1250.6-199.69-5.4048-29.255-1312.1-230.93159.14510.6952-1048.1-104.96388.175216.575-862.02399.015649.125219.21242.865-705.749.00565312.511207.74-839.969.6145211.973374.519-692.69369.703402.697380.548-903.47178.868405.314254.845-798.75147.316460.932293.849-784.7476.395559.683-892.1-889.8-890.4-889.7-728.2-734.9-736.3-735.5-575-571.5-557.9-569.4-408.1-409.8-408.6-409.8-246.2-244.1-249.4-252.3-72.76-77.27-77.33-77.3889.443-5.5-5.5-5.5-5.5-4.5-4.5-4.5-4.5-3.5-3.5-3.5-3.5-2.5-2.5-2.5-2.5-1.5-1.5-1.5-1.5-0.5-0.5-0.5-0.50.57747.72026.93138.31765.71601.72789636872316913725716389166367747.77924.7146469608.1146466087.21601.71905037257221954093.33966.43841.427218第4页共8页第3页共8页编号：时间：2021年x月x日书山有路勤为径，学海无涯苦作舟页码：第4页共8页23420001234200112342002123420031234200412344148.62916.454084.644242.423997.582881.014036.234360.334360.533172.184223.764690.484694.483342.354577.634965.465026.053470.244525....
