Page 130 Operator‘s Manual FERITSCOPE
®
FMP30
Evaluation
Skewness and kurtosis are printed out only if the evaluated readings do not
have normal distribution (with a normal distribution, skewness and kurtosis
are Zero!):
Fig. 8-8 Printout of a histogram without normal distribution (example)
H I S T O G R A M
n
10.1|
7 |*
10.2|
12 |*
10.2|
2 |*
10.3|
7 |*
10.4|
2 |*
10.5|
Distribution not normal
Skewness= 0.55 Kurtosis= -1.3
NORMAL PROBABILITY CHART
Upper limit Norm. Prop. Chart
10.2 23.33%
10.2 63.33%
10.3 70.00%
10.4 93.33%
10.5 100.00%
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