Basic Calculations

Movers are calculated by using a simple standard deviation formula.

Figure 1. Formula for standard deviation

where:

symbol
Description
Standard deviation
Captured value
Average of captured values
Number of captured values

The standard deviation is calculated by:

  1. Summing the square of the difference between each value and the average
  2. Dividing that value by the number of values - 1
  3. Calculating the square root of that value

When a mover is calculated and the count is zero, if at least one interval for that mover exists with data before this interval, then the zero count is written as the value for the current interval.