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curriculum/challenges/chinese/08-data-analysis-with-python/data-analysis-with-python-projects/mean-variance-standard-deviation-calculator.md
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---
id: 5e46f7e5ac417301a38fb928
title: Mean-Variance-Standard Deviation Calculator
title: 均值-方差-标准差 计算器
challengeType: 10
forumTopicId: 462366
dashedName: mean-variance-standard-deviation-calculator
---
# --description--
Create a function that uses Numpy to output the mean, variance, and standard deviation of the rows, columns, and elements in a 3 x 3 matrix.
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。
You can access [the full project description and starter code on Repl.it](https://repl.it/github/freeCodeCamp/boilerplate-mean-variance-standard-deviation-calculator).
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。
After going to that link, fork the project. Once you complete the project based on the instructions in 'README.md', submit your project link below.
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。
We are still developing the interactive instructional part of the data analysis with Python curriculum. For now, you will have to use other resources to learn how to pass this challenge.
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。
# --hints--
It should pass all Python tests.
它应该通过所有的 Python 测试。
```js