CODAP Query Param: ICI

The ICI query parameter makes available a boxplot option, Show ICI, to display an "informal confidence interval."

The informal confidence interval (ICI) is a concept developed and used in New Zealand's math and statistics curriculum. See Sample-to-population inference progressions across senior curriculum for Level 7 learning objectives. Given a distribution of numeric values, the ICI is defined the 1.5 * the interquartile range (IQR) divided by the square root of the sample size. The interval is the median ± the ICI. In comparing two distributions, if their ICIs don't overlap, one can reasonably conclude that the populations from which they are drawn have different medians.

Usage

Takes a value of 'yes' or 'no'. Default is 'no'. The Show ICI boxplot options is available if the query parameter has a value of 'yes'.

Example

https://codap.concord.org/releases/latest?ICI=yes