Quick Correlation Coefficients
Free
4.0for iPhone, iPod touch
Age Rating
Quick Correlation Coefficients Screenshots
About Quick Correlation Coefficients
The correlation coefficient (commonly noted by the Greek letter rho, ρ) measures the degree to which two sets of numbers are related. The correlation coefficient can range from -1.000 to +1.000 with a 0 indicating that there is no relation between the two sets.
A 'slider' data entry option allows rapid creation of numerical data. Additionally, you may use the 'keypad' data entry option to expand the numerical range beyond plus or minus 1,000.
In this application, you may relate two or three sets of numbers and the correlations between the sets are shown as ρ(AB), ρ(AC), and ρ(BC), where the letters A, B, and C represent the columns.
There must be at least 3 pairs of numbers in any 2 rows for the correlation coefficient to be computed. Zero is a number but 'n/a' is not. If, for example, Column A has 5 rows of numbers and the 6th row is 'n/a' and Column B has 4 rows of numbers and the 5th row is 'n/a', the correlation coefficient, ρ(AB), will be computed for the first 4 pairs of numbers.
A 'slider' data entry option allows rapid creation of numerical data. Additionally, you may use the 'keypad' data entry option to expand the numerical range beyond plus or minus 1,000.
In this application, you may relate two or three sets of numbers and the correlations between the sets are shown as ρ(AB), ρ(AC), and ρ(BC), where the letters A, B, and C represent the columns.
There must be at least 3 pairs of numbers in any 2 rows for the correlation coefficient to be computed. Zero is a number but 'n/a' is not. If, for example, Column A has 5 rows of numbers and the 6th row is 'n/a' and Column B has 4 rows of numbers and the 5th row is 'n/a', the correlation coefficient, ρ(AB), will be computed for the first 4 pairs of numbers.
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What's New in the Latest Version 4.0
Last updated on Jul 10, 2021
Old Versions
- Changes necessitated by iOS 13 & 14
- Removed links to Facebook and Twitter
- Various GUI changes and enhancements
- Some code simplification
- Removed links to Facebook and Twitter
- Various GUI changes and enhancements
- Some code simplification
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Version History
4.0
Jul 10, 2021
- Changes necessitated by iOS 13 & 14
- Removed links to Facebook and Twitter
- Various GUI changes and enhancements
- Some code simplification
- Removed links to Facebook and Twitter
- Various GUI changes and enhancements
- Some code simplification
3.4
May 21, 2018
This app has been updated by Apple to display the Apple Watch app icon.
- Updated to run under iOS 11.
- Corrected scroll view issue on information view.
- Updated deprecated alert displays.
- Updated to run under iOS 11.
- Corrected scroll view issue on information view.
- Updated deprecated alert displays.
3.3
Oct 1, 2015
- Changes to accommodate iOS 9, mostly font changes.
- Some GUI tweaks.
- Some GUI tweaks.
3.2
Jun 29, 2015
- Revised GUI with newly designed objects.
- Added links to Facebook and Twitter.
- New icon.
- Added links to Facebook and Twitter.
- New icon.
3.1
Oct 28, 2014
- Updated for iOS 8
- Minor GUI changes
- Minor GUI changes
3.0
Dec 5, 2013
- Redesigned and rewritten for iOS 7.
- Minor bug fixes.
- Minor bug fixes.
2.4
Feb 26, 2013
- Streamlined source code for better performance.
- GUI tweaks for iPhone 5.
- GUI tweaks for iPhone 5.
2.3
Oct 10, 2012
- To simplify moving between the two methods of data entry, we have added buttons for "Keypad" and "Slider" in the lower right-hand corner of the data entry views.
- On the 'Extended Correlation' view, we added a reminder that a data entry of zero is a number, but a blank data entry is an 'n/a' that removes the entry from the regression computation.
- On the 'Extended Correlation' view, we added a reminder that a data entry of zero is a number, but a blank data entry is an 'n/a' that removes the entry from the regression computation.
2.2
Oct 2, 2012
- Never mind. Removed upside-down portrait mode that caused display issues when editing.
- Modified syntax of iTunes App Store link.
- Modified syntax of iTunes App Store link.
2.1
Aug 23, 2012
- Added ability to create values with zero to three decimal place precision in the 'Keypad Input' screen and changed the way that numbers are assigned plus or minus signs.
- Extended the number of data entries per column from 10 to 12 in the 'Keypad Input' screen.
- In 'Keypad Input', removing a data entry with the 'n/a' description is accomplished by making the entry blank.
- Improved floating point precision of all calculations from single to double.
- Minor GUI changes.
- Extended the number of data entries per column from 10 to 12 in the 'Keypad Input' screen.
- In 'Keypad Input', removing a data entry with the 'n/a' description is accomplished by making the entry blank.
- Improved floating point precision of all calculations from single to double.
- Minor GUI changes.
2.0
Apr 11, 2012
- Added new page for 'keypad' data entry beyond the -1000 to +1000 numerical limits of the 'slider' data entry
- Various display modifications
- Various display modifications
1.2
Dec 20, 2011
- Streamlined source code for faster load time
- Added ability to move backward when entering data
- Enlarged buttons slightly for better touch control
- Fixed code that prevented columns B or C with 'n/a' in first row from computing correlations
- Minor GUI changes
- Added ability to move backward when entering data
- Enlarged buttons slightly for better touch control
- Fixed code that prevented columns B or C with 'n/a' in first row from computing correlations
- Minor GUI changes
1.1
Dec 1, 2011
- Added link on flip side view to MSYapps in iTunes App Store
1.0
Nov 10, 2011
Quick Correlation Coefficients FAQ
Click here to learn how to download Quick Correlation Coefficients in restricted country or region.
Check the following list to see the minimum requirements of Quick Correlation Coefficients.
iPhone
Requires iOS 12.3 or later.
iPod touch
Requires iOS 12.3 or later.
Quick Correlation Coefficients supports English
