What is interval analysis?
The simplest method for propagating uncertainty through arithmetic calculations is to use interval (range) analysis. For example, suppose we want to add two numbers whose values were unsure about. If we know that the first number, say A, has a value somewhere between 4 and 6, and the other number, B, is between 8 and 10, then the result of A+B is between 12 and 16, as shown at left. The difference between these numbers, B-A, is the interval [2,6]. Risk Calc makes it easy to compute with intervals and it supports popular conventions for specifying intervals. You can enter intervals as [12.5 0.5], as [2,3], or you can let Risk Calc interpret significant digits to create intervals automatically from your input. For example, [5.0] will be interpreted by Risk Calc as [4.95,5.05], and [5.00] will be interpreted as [4.995, 5.005].
Related Questions
- Do the resulting fluxes for a specified analysis time interval give the mean flux levels, or a flux level at a particular instant (e.g. at the begin, center, or end of the interval)?
- Is it okay to use dichotomous variables in procedures like regression or path analysis which assume interval data?
- Is it okay to use ordinal variables in procedures like regression or path analysis that assume interval data?
