统计达人的相关系数,显著性检验

数学成绩x,语文成绩y,已知成绩总体不是正态分布,计算两门成绩之间的相关系数并做显著性检验.
x67 78 77 72 79 81 76 73 70
y70 84 76 77 81 84 77 70 75

相关系数：
r=（相关系数公式打不出来）=0.824737728
∑x=673
∑y=694
∑xy=52053
n=9
∑x^2=50493
∑y^2=53732
自由度：n-2=7
在附表3中查出相关系数临界值：r0.05=0.666
∵|r|>r0.05
∴y与x之间具有线性相关关系

VERSION 5.00
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