marposs Merlin - Position Indices; Dispersion Indices

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Dispersion indices
Position indices
Mean - The sum of all the measurements carried out, divided by the number of
measurements.
Where:
x
i
is the i
th
measurement
N is the number of measurements
Range - The difference between the largest and the smallest value in a set of N
measurements
X
max
- X
min
Where
X
max
is the maximum value
X
min
is the minimum value
Standard deviation - Indicates the dispersion of the measurements. Given a set of
measurements:
Where
x
i
is the i
th
measurement
X is the mean measurement value
N is the number of measurements
NOTE: Standard deviation is also identified as SIGMA and represented
by the corresponding letter in the Greek alphabet (σ).