第十一题
![Mathematica入门习题[11]–随机数的生成与一些统计指标](https://img.mathpretty.com/snipaste_20170912_215319.png?imageView2/0/q/75|watermark/2/text/5YWz5rOo5YWs5LyX5Y-377ya5paH6Im65pWw5a2m5ZCb/font/5b6u6L2v6ZuF6buR/fontsize/540/fill/IzAwMDAwMA==/dissolve/100/gravity/SouthEast/dx/10/dy/10|imageslim)
ran = RandomReal[UniformDistribution[{0, 1}], 30000];
Histogram[ran]
"平均值 --" <> ToString@Mean[ran]
"标准差 --" <> ToString@StandardDeviation[ran]
"最大值 --" <> ToString@Max[ran]
"最小值 --" <> ToString[N@Min[ran]]
">.5的百分比 --" <> ToString[Count[ran, x_ /; x > .5]]
![Mathematica入门习题[11]–随机数的生成与一些统计指标](https://img.mathpretty.com/snipaste_20170912_220649.png?imageView2/0/q/75|watermark/2/text/5YWz5rOo5YWs5LyX5Y-377ya5paH6Im65pWw5a2m5ZCb/font/5b6u6L2v6ZuF6buR/fontsize/540/fill/IzAwMDAwMA==/dissolve/100/gravity/SouthEast/dx/10/dy/10|imageslim)
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