《生物统计学》复习题及答案(精心整理)(精心整理)

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某研究者测得10名3岁儿童的体重(X:kg)与体表面积(Y:×100$$cm^2$$),并求得Y随X变化的直线回归方程为$$Y=2.5212+0.2385X$$,相关系数r=0.5779。问此直线回归方程是否有显著性意义? 附录: 附表1 学生氏t值表(两尾) | 自由度df | 0.20 | 0.10 | 0.05 | 0.01 | 0.005 | |----------|------|------|------|------|-------| | 6 | 1.440 | 1.943 | 2.447 | 3.707 | 4.317 | | 7 | 1.415 | 1.895 | 2.365 | 3.499 | 4.029 | | 8 | 1.397 | 1.860 | 2.306 | 3.355 | 3.833 | | 9 | 1.383 | 1.833 | 2.262 | 3.250 | 3.690 | | 10 | 1.372 | 1.812 | 2.228 | 3.169 | 3.581 | | 11 | 1.363 | 1.796 | 2.201 | 3.106 | 3.497 | | 12 | 1.356 | 1.782 | 2.179 | 3.055 | 3.428 | | 13 | 1.350 | 1.771 | 2.160 | 3.012 | 3.372 | | 14 | 1.345 | 1.761 | 2.145 | 2.977 | 3.326 | | 15 | 1.341 | 1.753 | 2.131 | 2.947 | 3.286 | | 16 | 1.337 | 1.746 | 2.120 | 2.921 | 3.252 | | 17 | 1.333 | 1.740 | 2.110 | 2.898 | 3.222 | | 18 | 1.330 | 1.734 | 2.101 | 2.878 | 3.197 | | 19 | 1.328 | 1.729 | 2.093 | 2.861 | 3.174 | | 20 | 1.325 | 1.725 | 2.086 | 2.845 | 3.153 | | 21 | 1.323 | 1.721 | 2.080 | 2.831 | 3.135 | | 22 | 1.321 | 1.717 | 2.074 | 2.819 | 3.119 | | 23 | 1.319 | 1.714 | 2.069 | 2.807 | 3.104 | | 24 | 1.318 | 1.711 | 2.064 | 2.797 | 3.091 | | 25 | 1.316 | 1.708 | 2.060 | 2.787 | 3.078 | 附表2 $$\chi^2$$值表(右尾) | 自由度df | 0.1 | 0.05 | 0.01 | 0.005 | |----------|-----|------|------|-------| | 1 | 2.71 | 3.84 | 6.63 | 7.88 | | 2 | 4.61 | 5.99 | 9.21 | 10.60 | | 3 | 6.25 | 7.81 | 11.34 | 12.84 | | 4 | 7.78 | 9.49 | 13.28 | 14.86 | | 5 | 9.24 | 11.07 | 15.09 | 16.75 | 附表3 r和R的5%和1%显著值 | 自由度df | 概率P | 变数的个数(M) | | | |----------|-------|-----------------|---|---| | | | 2 | 3 | 4 | | 1 | 0.05 | 0.997 | 0.999 | 0.999 | | | 0.01 | 1.000 | 1.000 | 1.000 | | 2 | 0.05 | 0.950 | 0.975 | 0.983 | | | 0.01 | 0.990 | 0.995 | 0.997 | | 3 | 0.05 | 0.878 | 0.930 | 0.950 | | | 0.01 | 0.959 | 0.977 | 0.983 | | 4 | 0.05 | 0.811 | 0.881 | 0.912 | | | 0.01 | 0.917 | 0.949 | 0.962 | | 5 | 0.05 | 0.754 | 0.836 | 0.874 | | | 0.01 | 0.875 | 0.917 | 0.937 | | 6 | 0.05 | 0.707 | 0.795 | 0.839 | | | 0.01 | 0.834 | 0.886 | 0.911 | | 7 | 0.05 | 0.666 | 0.758 | 0.807 | | | 0.01 | 0.798 | 0.855 | 0.885 | | 8 | 0.05 | 0.632 | 0.726 | 0.777 | | | 0.01 | 0.765 | 0.827 | 0.860 | | 9 | 0.05 | 0.602 | 0.697 | 0.750 | | | 0.01 | 0.735 | 0.800 | 0.837 | | 10 | 0.05 | 0.576 | 0.671 | 0.726 |【缺少答案,请补充】