價格：免費
更新日期：2019-01-21
檔案大小：8.9 MB
目前版本：1.0.1
版本需求：需要 iOS 10.0 或以上版本。與 iPhone 5s、iPhone 6、iPhone 6 Plus、iPhone 6s、iPhone 6s Plus、iPhone SE、iPhone 7、iPhone 7 Plus、iPhone 8、iPhone 8 Plus、iPhone X、iPhone XS、iPhone XS Max、iPhone XR、iPad Air、iPad Air Wi-Fi + Cellular、iPad mini 2、iPad mini 2 Wi-Fi + Cellular、iPad Air 2、iPad Air 2 Wi-Fi + Cellular、iPad mini 3、iPad mini 3 Wi-Fi + Cellular、iPad mini 4、iPad mini 4 Wi-Fi + Cellular、12.9 吋 iPad Pro、12.9 吋 iPad Pro Wi-Fi + Cellular、iPad Pro（9.7 吋）、iPad Pro（9.7 吋）Wi-Fi + 行動網路、iPad (第 5 代)、iPad（第五代）Wi-Fi + 行動網路、iPad Pro（12.9 吋)（第二代）、iPad Pro（12.9 吋)（第二代）Wi-Fi + 行動網路、iPad Pro（10.5 吋)、iPad Pro（10.5 吋）Wi-Fi + 行動網路、iPad （第六代）、iPad Wi-Fi + Cellular（第六代）、iPad Pro（11 吋）、iPad Pro（11 吋） Wi-Fi + 行動網路、iPad Pro（12.9 吋)、iPad Pro（12.9 吋）Wi-Fi + 行動網路、iPad mini（第 5 代）、 iPad mini（第 5 代）Wi-Fi + 行動網路、 iPad Air（第 3 代）、 iPad Air（第 3 代）Wi-Fi + 行動網路 及 iPod touch 相容。
支援語言：英語
If you're planning to run an experiment – either on the web or in real-life – it's critical to collect the right amount data so that you know the experiment results are scientifically valid.
A/B Buddy is a sample-size calculator that helps you design A/B experiments with a quick slide of a finger. It uses a power-analysis formula to tell you exactly how many subjects, or users, that you'll need in an experiment in order to detect a statistically significant difference between two groups. Because if you have too few users in the experiment, you'll never see any difference between "A" and "B"; if you have too many enrolled, the experiment will never end. A/B Buddy tells you exactly the right number.
How does it work? Let's say your current conversion rate is 10%, and you want to see if a proposed change from the design team can boost that number up to 12% – that is, a 20% lift in the conversion rate. Simply pop open A/B Buddy, set the Baseline conversion rate to 10%, and the Minimum Detectable Effect to 20%, and your answer is waiting for you at the top of the screen.
A/B Buddy includes a Share button, which links to a web page displaying your sample size calculation. Your numbers, however, remain 100% private – all the information is stored in the URL fragment, and is never transmitted to any servers.
By default, A/B Buddy uses the most common statistical thresholds: 5% for the significance level (false-positive rate), and 80% for the power level (ability to detect the Minimum Detectable Effect). Power users can adjust these values after unlocking the Pro Features in-app purchase. But most users will find the defaults adequate for their needs.
Questions? Suggestions? Ideas? Feedback is always welcome at emmiller@gmail.com
支援平台：iPhone, iPad