About Power Analysis
Design experiments and measurements confidently with minimal knowledge of statistics. Have you ever worried if the study you were planning would have enough data to conclude anything? Know how much data you need while...
Design experiments and measurements confidently with minimal knowledge of statistics. Have you ever worried if the study you were planning would have enough data to conclude anything? Know how much data you need while you're still in the planning phase. Let the app do the statistics for you. . Easy to use interface helps you enter the pertinent information without being a statistics expert. . Know how many observations you'll need to measure what you want. . Know how good a measurement you'll get for any number of observations you set. . Visualizations . Play with sliders for key parameters and see how they affect the measurement . Supports measurements of rates and proportions (binomial distributions) in addition to continuous distributions . Chooses appropriate statistical test for you based on your experimental parameters. (Tests include t, z, chi square, and exact binomial). . Set your preferred risk of both false positives and false negatives (type I error and type II error) Can also be useful as an interactive study tool for learning about the statistics of measurement
Version History This update from Apple will improve the functionality of this app. No new features are included. • Fixes for user reported issues 2.0.1 08/01/2018 • Updated for iOS 9 including Slide Over and Split View. Check significance without leaving the article you are reading! • Updated appearance • New UI flow lets you choose if you want a sample size calculation or to evaluate a test and acts accordingly • Allow separate standard deviations for two sample case 2.0.0 12/10/2015 • Updated for iOS 7 compatibility 1.4.0 09/24/2013 • Updated for iOS6 • Updated for iPhone 5 1.3.1 11/02/2012 • Added option for one-tail tests. Default remains two-tail. 1.3.0 07/12/2012 • Internationalized • First localization is Chinese 1.2.1 02/22/2012 • Allows you to control your risk of false negatives (type II error) 1.2.0 01/24/2012 • Now universal so you can use on your iphone/ipod as well • Now displays formal name of statistical test currently being used, also displays p value in more formal language • Now using two-tail tests because this is the more common use case for our customers 1.1.0 09/19/2011 • User interface fixes: Full interface visible right away when you open the app so you can start using it immediately • Bug fixes 1.0.2 06/24/2011 • Return key now enters information and dismisses keyboard -- sorry for the inconvenience • Displays p-value as well as confidence interval • Added button to get email support. Get help with the software or with statistics. Feature requests welcome! • Cleaned up wording in a few places 1.0.1 06/15/2011 1.0 06/10/2011
Previous Versions
Here you can find the changelog of Power Analysis since it was posted on our website on 2016-10-03 05:38:42.
The latest version is 2.0.1 and it was updated on 2026-07-01 01:27:09. See below the changes in each version.
Power Analysis version 2.0.1
Updated At: 2026-07-01
Changes: Version History This update from Apple will improve the functionality of this app. No new features are included.
• Fixes for user reported issues 2.0.1 08/01/2018 • Updated for iOS 9 including Slide Over and Split View. Check significance without leaving the article you are reading!
• Updated appearance
• New UI flow lets you choose if you want a sample size calculation or to evaluate a test and acts accordingly
• Allow separate standard deviations for two sample case 2.0.0 12/10/2015 • Updated for iOS 7 compatibility 1.4.0 09/24/2013 • Updated for iOS6
• Updated for iPhone 5 1.3.1 11/02/2012 • Added option for one-tail tests. Default remains two-tail. 1.3.0 07/12/2012 • Internationalized
• First localization is Chinese 1.2.1 02/22/2012 • Allows you to control your risk of false negatives (type II error) 1.2.0 01/24/2012 • Now universal so you can use on your iphone/ipod as well
• Now displays formal name of statistical test currently being used, also displays p value in more formal language
• Now using two-tail tests because this is the more common use case for our customers 1.1.0 09/19/2011 • User interface fixes: Full interface visible right away when you open the app so you can start using it immediately
• Bug fixes 1.0.2 06/24/2011 • Return key now enters information and dismisses keyboard -- sorry for the inconvenience
• Displays p-value as well as confidence interval
• Added button to get email support. Get help with the software or with statistics. Feature requests welcome!
• Cleaned up wording in a few places 1.0.1 06/15/2011 1.0 06/10/2011
Power Analysis version 2.0.1
Updated At: 2018-08-01
Changes: Aug 1, 2018
Version 2.0.1
This app has been updated by Apple to display the Apple Watch app icon.
• Fixes for user reported issues
Power Analysis version 2.0.1
Updated At: 2018-08-01
Changes: This app has been updated by Apple to display the Apple Watch app icon.
• Fixes for user reported issues
Power Analysis version 2.0.0
Updated At: 2011-06-10
Disclaimer
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