2020-08-13 12:00:20 +02:00
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---
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id: 5e46f7e5ac417301a38fb928
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2021-07-03 20:07:10 +05:30
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title: 均值-方差-标准差 计算器
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2020-08-13 12:00:20 +02:00
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challengeType: 10
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2021-07-03 20:07:10 +05:30
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forumTopicId: 462366
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2021-01-13 03:31:00 +01:00
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dashedName: mean-variance-standard-deviation-calculator
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2020-08-13 12:00:20 +02:00
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---
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2020-12-16 00:37:30 -07:00
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# --description--
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2021-07-03 20:07:10 +05:30
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创建一个函数，这个函数可以使用 Numpy 输出 3 x 3 矩阵的每一行、每一列和所有元素的均值，方差和标准差。
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2020-08-13 12:00:20 +02:00
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2021-07-03 20:07:10 +05:30
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你可以在 [Replit](https://replit.com/github/freeCodeCamp/boilerplate-mean-variance-standard-deviation-calculator) 上查看整个项目的具体描述和初始代码。
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2020-08-13 12:00:20 +02:00
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2021-07-03 20:07:10 +05:30
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点击此链接，fork 这个项目。 当你根据 “README.md” 中的说明完成了项目，请在下方提交你的项目链接。
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2020-08-13 12:00:20 +02:00
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2021-07-03 20:07:10 +05:30
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我们仍在开发 Python 数据分析课程的交互式教学。 现在，您将需要使用其他资源来学习如何通过这一挑战。
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2020-08-13 12:00:20 +02:00
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2020-12-16 00:37:30 -07:00
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# --hints--
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2020-08-13 12:00:20 +02:00
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2021-07-03 20:07:10 +05:30
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它应该通过所有的 Python 测试。
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2020-08-13 12:00:20 +02:00
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2020-12-16 00:37:30 -07:00
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```js
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2020-08-13 12:00:20 +02:00
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```
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2020-12-16 00:37:30 -07:00
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# --solutions--
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2020-08-13 12:00:20 +02:00
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2021-01-13 03:31:00 +01:00
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```py
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# Python challenges don't need solutions,
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# because they would need to be tested against a full working project.
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# Please check our contributing guidelines to learn more.
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```
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