Quick Confidence Interval
$0.99
2.8for iPhone, iPod touch
Age Rating
Quick Confidence Interval Screenshots
About Quick Confidence Interval
In statistics, confidence intervals can be used to express the degree to which sample results are reliable.
Confidence intervals are often stated in terms of a percentage like 90% or 95%. When the sample or population distribution is the Normal (bell-shaped) distribution, the confidence intervals can be represented as a number of standard deviations (σ) above or below the sample mean (μ).
Moving the slider beneath the graph will vary the confidence intervals from 50% to 99%. Additionally, you may choose the two-tailed confidence intervals or the one-tailed interval by tapping the button beneath the slider.
In this application, you may chose the standardized Normal distribution with μ=0.0 and σ=1.0 or some other values for mean and standard deviation.
Confidence intervals are often stated in terms of a percentage like 90% or 95%. When the sample or population distribution is the Normal (bell-shaped) distribution, the confidence intervals can be represented as a number of standard deviations (σ) above or below the sample mean (μ).
Moving the slider beneath the graph will vary the confidence intervals from 50% to 99%. Additionally, you may choose the two-tailed confidence intervals or the one-tailed interval by tapping the button beneath the slider.
In this application, you may chose the standardized Normal distribution with μ=0.0 and σ=1.0 or some other values for mean and standard deviation.
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What's New in the Latest Version 2.8
Last updated on Nov 22, 2023
Old Versions
- Compiled with Xcode 15
- Minor GUI change
- Minor GUI change
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Version History
2.8
Nov 22, 2023
- Compiled with Xcode 15
- Minor GUI change
- Minor GUI change
2.7
Oct 21, 2020
- Changes necessitated by iOS 13 & 14
- Removed links to Facebook and Twitter
- Some GUI changes
- Removed links to Facebook and Twitter
- Some GUI changes
2.6
Feb 10, 2019
- Added audio cues on buttons.
- Compiled with Xcode 10.1.
- Compiled with Xcode 10.1.
2.5
Oct 1, 2015
- Changes to accommodate iOS 9, mostly font modifications.
2.4
Jul 7, 2015
- Changed the app icon.
2.3
Jun 29, 2015
- Updated to iOS 8.
- Changed and improved Facebook and Twitter link syntax.
- GUI changes.
- Changed and improved Facebook and Twitter link syntax.
- GUI changes.
2.2
Jan 7, 2015
- Added links to social apps Facebook and Twitter
- The social apps and an account for each must exist for the link to be active
- Update graphing engine
- Changed minimum iOS to 7.1
- The social apps and an account for each must exist for the link to be active
- Update graphing engine
- Changed minimum iOS to 7.1
2.1
Oct 5, 2014
- Updated for iOS 8 and iPhone 6.
- Minor GUI tweaks.
- Updated graphing engine.
- Minor GUI tweaks.
- Updated graphing engine.
2.0
Oct 8, 2013
- Major rewrite and redesign for iOS 7.
1.5
Jul 29, 2013
- Minor GUI enhancements.
- Updated the graphing engine.
- Updated the graphing engine.
1.3
Nov 27, 2012
- Expanded screens to accommodate size of iPhone 5.
- Bug fixes.
- Bug fixes.
1.2
Sep 30, 2012
- Fixed bug in data entry routine.
- Improved precision from single to double.
- Modified syntax of iTunes App Store link.
- Improved precision from single to double.
- Modified syntax of iTunes App Store link.
1.1
Jan 6, 2012
- Tweaked GUI for improved data entry
1.0
Dec 1, 2011
Quick Confidence Interval FAQ
Click here to learn how to download Quick Confidence Interval in restricted country or region.
Check the following list to see the minimum requirements of Quick Confidence Interval.
iPhone
Requires iOS 12.0 or later.
iPod touch
Requires iOS 12.0 or later.
Quick Confidence Interval supports English
