<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>留存曲线 on PlumePHP</title><link>https://plumephp.com/tags/%E7%95%99%E5%AD%98%E6%9B%B2%E7%BA%BF/</link><description>Recent content in 留存曲线 on PlumePHP</description><generator>Hugo</generator><language>zh-CN</language><lastBuildDate>Fri, 23 Oct 2026 00:00:00 +0000</lastBuildDate><atom:link href="https://plumephp.com/tags/%E7%95%99%E5%AD%98%E6%9B%B2%E7%BA%BF/index.xml" rel="self" type="application/rss+xml"/><item><title>留存曲线：找平坦段，而不是追高数字</title><link>https://plumephp.com/indie-retain-05-retention-curve/</link><pubDate>Fri, 23 Oct 2026 12:40:00 +0800</pubDate><guid>https://plumephp.com/indie-retain-05-retention-curve/</guid><description>D1、D7、D30 三个数字不足以判断留存好坏：区分指数衰减、幂律与带平台三种曲线的诊断与处方，读平台高度而不是单周高点，并复算 300 人与 120 人两组样本的 4 个百分点差异是否只是抽样噪声，再倒推所需样本量，避免把噪声当成结论。</description></item></channel></rss>