RWEP/SD/20240326_9_课后作业/index.qmd

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---
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title: "课后作业7"
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subtitle: 《区域水环境污染数据分析实践》<br>Data analysis practice of regional water environment pollution
author: 苏命、王为东<br>中国科学院大学资源与环境学院<br>中国科学院生态环境研究中心
date: today
lang: zh
format:
revealjs:
theme: dark
slide-number: true
chalkboard:
buttons: true
preview-links: auto
lang: zh
toc: true
toc-depth: 1
toc-title: 大纲
logo: ./_extensions/inst/img/ucaslogo.png
css: ./_extensions/inst/css/revealjs.css
pointer:
key: "p"
color: "#32cd32"
pointerSize: 18
revealjs-plugins:
- pointer
filters:
- d2
---
```{r}
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#| include: false
#| cache: false
lang <- "cn"
require(tidyverse)
require(learnr)
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```
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## 第7次课后作业
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1. 根据`airqualitydf.xlsx`按采样点统计周末2天与工作日5天中空气质量指数AQI中位数按城市统计低于所有采样点AQI30%分位值的采样点占比列出上述占比最高的10个城市不考虑采样点数低于5个的城市
2. 按照不同城市分组统计周末2天与工作日5天AQI中位数是否具有显著差异。
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作业模板:[第7次课后作业_模板.qmd](https://drwater.rcees.ac.cn/git/course/RWEP/raw/branch/main/SD/20240326_9_课后作业/第7次课后作业_模板.qmd)
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## 欢迎讨论!{.center}
`r rmdify::slideend(wechat = FALSE, type = "public", tel = FALSE, thislink = "https://drwater.rcees.ac.cn/course/public/RWEP/@PUB/SD/")`