第1次作业数据
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样本序号
人口密度x 1/(人·.km -2
)
人均耕地面积
x 2/hm 2
)
森林覆盖率x 3/%
1363.9120.35216.1012141.503 1.68424.3013100.695 1.06765.6014143.739 1.33633.2055131.412 1.62316.607668.337 2.03276.204795.4160.80171.106862.901 1.65273.307986.6240.84168.9041091.3940.81266.5021176.9120.85850.3021251.274 1.04164.6091368.8310.83662.8041477.3010.62360.1021576.948 1.02268.0011699.2650.65460.70217118.5050.66163.30418141.4730.73754.20619137.7610.59855.90120117.612 1.24554.50321
122.781
0.731
49.102
1363.9120.352250.8362141.503 1.68428.4273100.695 1.067-12.3814143.739 1.33630.6635131.412 1.62318.336668.337 2.032-44.739795.4160.801-17.660862.901 1.652-50.175986.6240.841-26.4521091.3940.812-21.6821176.9120.858-36.1641251.274 1.041-61.8021368.8310.836-44.24514
77.301
0.623
-35.775
1576.948 1.022-36.128
1699.2650.654-13.811
17118.5050.661 5.429
18141.4730.73728.397
19137.7610.59824.685
20117.612 1.245 4.536
21122.7810.7319.705
总计2374.59621.206 1.13687E-13平均值113.076 1.009809524 5.41366E-15开根号
计算步骤：
计算结果：
1363.9120.35216.101 2141.503 1.68424.301
3100.695 1.06765.6014143.739 1.33633.2055131.412 1.62316.607668.337 2.03276.204795.4160.80171.106862.901 1.65273.307986.6240.84168.9041091.3940.81266.5021176.9120.85850.3021251.274 1.04164.6091368.8310.83662.8041477.3010.62360.1021576.948 1.02268.0011699.2650.65460.70217118.5050.66163.30418141.4730.73754.20619137.7610.59855.90120117.612 1.24554.50321
122.781
0.731
49.102
总计2374.59621.2061155.374平均值113.076 1.00980952455.01780952
开根号
计算步骤：
155.2875833
-0.034897657
同理：
得：又知：得：
问：变量X4与变量X1/X2/X3之间的复相关系数R4.123
样本序号
人口密度x 1/(人·.km -2)
人均耕地面积x 2/hm 2)
森林覆盖率x 3
/%
1363.9120.35216.1012
141.503
1.684
24.301
3100.695 1.06765.6014143.739 1.33633.2055131.412 1.62316.607668.337 2.03276.204795.4160.80171.106862.901 1.65273.307986.6240.84168.9041091.3940.81266.5021176.9120.85850.3021251.274 1.04164.6091368.8310.83662.8041477.3010.62360.1021576.948 1.02268.0011699.2650.65460.70217118.5050.66163.30418141.4730.73754.20619137.7610.59855.90120117.612 1.24554.50321
122.781
0.731
49.102
总计2374.59621.2061155.374平均值113.076 1.00980952455.01780952
开根号
计算步骤：
-174945.6564
得：
-0.335600207
同理：
2269.049342
0.644141142
得：
0.53426685
0.890087902
则：
0.600240548
同理：
10154.31412
0.069997017