Minitab Project Report
3C
Histogram of C3
Normal
14
Mean
StDev
N
12
-2.33037E-16
0.08543
101
Frequency
10
8
6
4
2
0
-0.150
-0.075
0.000
C3
0.075
0.150
Minimum
-0.19357
Maximum
0.19966
Descriptive Statistics: C3
Variable
C3
Mean
-0.00000
StDev
0.08543
Variance
0.00730
Skewness
-0.34
Kurtosis
-0.35
Comment: The data is approximately a normal distribution, with the mean being equal to
the reference height. There seems to be slightly more aperities that are above the reference
height (mean), which is highlighted by the negative skewness.
3D
Autocorrelation Function for C3
(with 5% significance limits for the autocorrelations)
0.2
Autocorrelation
0.1
0.0
-0.1
-0.2
1
2
3
4
5
6
7
8
9
10
Lag
Autocorrelation Function: C3
Lag
1
2
3
4
5
6
7
8
9
10
ACF
0.066991
-0.127087
-0.056701
0.053331
-0.061358
0.090724
-0.103898
-0.038582
0.084875
0.028492
T
0.67
-1.27
-0.56
0.52
-0.60
0.89
-1.01
-0.37
0.81
0.27
LBQ
0.47
2.16
2.51
2.81
3.22
4.12
5.31
5.48
6.30
6.39
Comment: Above is the graph of value of the autocorrelation for different lags (i.e. offsets). The positive
correlations at 1, 4, 6, 9 shows that these distance from the the reference point, there are similarities in the the
heights. This allows one to see the general height as a function of distance along the surface. The negative
correlation values show that there is not a good correlation between the reference surface height and the surface
height X (i.e. 2,3,5,7,8) microns away.