Calculating the statistical data
Average value
The average (AVG) is calculated as an arithmetical
mean:
AVG =
(
x
1
+
x
2
+
x
3
+
…
x
n
)
n
whereby
x = single measurement
n = number of measurements
Relative tolerance range
The relative tolerance range (RNG) is calculated as fol-
lows:
RNG[%] =
(
MAX
−
MIN
)
⋅
100
AVG
Relative standard deviation
The relative standard deviation (STD) is calculated as
follows:
STD[%] =
S
AVG
⋅
100
whereby
S = Standard deviation (mean error
of single measurement)
S is calculated as follows:
S =
√
(
x
1
−
AVG
)
2
+
(
x
2
−
AVG
)
2
+
…
+
(
x
n
−
AVG
)
2
(
n
−
1
)
Minimum material thickness
The minimum material thickness required (tenfold in-
dentation depth) is calculated as follows:
d[mm] = 0.62 X
√
Test
load
[
N
]
⁄
Average
value
[
HV
]
Notes on statistical evaluation
Appendix
Krautkrämer MIC 10
Issue 08, 08/01
12-7
Calculating the statistical data
Average value
The average (AVG) is calculated as an arithmetical
mean:
AVG =
(
x
1
+
x
2
+
x
3
+
…
x
n
)
n
whereby
x = single measurement
n = number of measurements
Relative tolerance range
The relative tolerance range (RNG) is calculated as fol-
lows:
RNG[%] =
(
MAX
−
MIN
)
⋅
100
AVG
Relative standard deviation
The relative standard deviation (STD) is calculated as
follows:
STD[%] =
S
AVG
⋅
100
whereby
S = Standard deviation (mean error
of single measurement)
S is calculated as follows:
S =
√
(
x
1
−
AVG
)
2
+
(
x
2
−
AVG
)
2
+
…
+
(
x
n
−
AVG
)
2
(
n
−
1
)
Minimum material thickness
The minimum material thickness required (tenfold in-
dentation depth) is calculated as follows:
d[mm] = 0.62 X
√
Test
load
[
N
]
⁄
Average
value
[
HV
]
Notes on statistical evaluation
Appendix
Krautkrämer MIC 10
Issue 08, 08/01
12-7
Summary of Contents for Krautkramer MIC 10
Page 6: ...0 6 Issue 08 08 01 Krautkrämer MIC 10 ...
Page 7: ...1 Introduction Krautkrämer MIC 10 Issue 08 08 01 1 1 1 Introduction ...
Page 16: ...1 10 Issue 08 08 01 Krautkrämer MIC 10 ...
Page 29: ...4 Basics of operation Krautkrämer MIC 10 Issue 08 08 01 4 1 4 Basics of operation ...
Page 37: ...5 Operation Krautkrämer MIC 10 Issue 08 08 01 5 1 5 Operation ...
Page 69: ......
Page 70: ......
Page 71: ...6 Configuration Krautkrämer MIC 10 Issue 08 08 01 6 1 6 Configuration ...
Page 88: ...7 10 Issue 08 08 01 Krautkrämer MIC 10 ...
Page 89: ...8 Care and maintenance Krautkrämer MIC 10 Issue 08 08 01 8 1 8 Care and maintenance ...
Page 97: ...10 Specifications Krautkrämer MIC 10 Issue 08 08 01 10 1 10 Specifications ...
Page 100: ...10 4 Issue 08 08 01 Krautkrämer MIC 10 ...
Page 123: ...12 Appendix Krautkrämer MIC 10 Issue 08 08 01 12 1 12 Appendix ...
Page 133: ...13 Changes Krautkrämer MIC 10 Issue 08 08 01 13 1 13 Changes ...
Page 135: ...14 Index Krautkrämer MIC 10 Issue 08 08 01 14 1 14 Index ...
