App Detail » Quick Correlation Coefficients

What's New

- Changes necessitated by iOS 13 & 14
- Removed links to Facebook and Twitter
- Various GUI changes and enhancements
- Some code simplification

App Description

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.

App Changes

• June 08, 2014 Initial release
• November 03, 2014 New version 3.1
• November 13, 2014 Price increase: $0.99 -> $1.99
• June 29, 2015 New version 3.2
• October 03, 2015 New version 3.3
• June 13, 2019 New version 3.4
• October 27, 2020 Price decrease: $1.99 -> $0.99
• August 05, 2021 New version 4.0
• August 05, 2021 Price decrease: $0.99 -> FREE!