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Cricket (C vs P) data
The data set (and description) can be downloaded here:
http://stat.ethz.ch/Teaching/Datasets/cricket.dat
Description:
TITLE : cricket
KEYWORDS (statist) : linear regression
APPLICATION AREA : biology
SHORT DESCRIPTION :
Influence of different factors on the cholinesterase
cricket eggs (in % of the normal value).
Explanatory variables are:
- age of the eggs in days at the moment of treatment;
- age of the eggs in days at the moment of observations;
- incecticide (0 = carbaryl, 1 = propoxur);
- dose of treatment in microgramm per egg.
DIM.(VAR./OBS.) : 4 / 156
Descriptive statistics:
Dataset= cricket_CvsP : n= 156 , d= 4
Class1: n= 78
Covariance matrix:
[,1] [,2] [,3] [,4]
[1,] 1101.2721 0.9071 40.4695 -0.1377
[2,] 0.9071 2.4875 1.0190 0.0000
[3,] 40.4695 1.0190 2.4875 0.0000
[4,] -0.1377 0.0000 0.0000 0.0270
Correlation matrix:
[,1] [,2] [,3] [,4]
[1,] 1.0000 0.0173 0.7732 -0.0252
[2,] 0.0173 1.0000 0.4096 0.0000
[3,] 0.7732 0.4096 1.0000 0.0000
[4,] -0.0252 0.0000 0.0000 1.0000
Median: 93.3861 4.9466 7.6388 0.7801
Mean: 77.641 4.9231 7.0769 0.8
MCD-estimated:
MDC-0.975-Mean: 93.9138 5 7.6897 0.7897
MDC-0.750-Mean: 93.9138 5 7.6897 0.7897
MDC-0.500-Mean: 93.9138 5 7.6897 0.7897
Class2: n= 78
Covariance matrix:
[,1] [,2] [,3] [,4]
[1,] 856.9519 -2.1079 33.0819 -0.8026
[2,] -2.1079 2.4875 1.0190 0.0000
[3,] 33.0819 1.0190 2.4875 0.0000
[4,] -0.8026 0.0000 0.0000 0.0270
Correlation matrix:
[,1] [,2] [,3] [,4]
[1,] 1.0000 -0.0457 0.7165 -0.1668
[2,] -0.0457 1.0000 0.4096 0.0000
[3,] 0.7165 0.4096 1.0000 0.0000
[4,] -0.1668 0.0000 0.0000 1.0000
Median: 83.6784 4.915 6.9979 0.7924
Mean: 79.4487 4.9231 7.0769 0.8
MCD-estimated:
MDC-0.975-Mean: 78.1452 5.1774 7.0484 0.7935
MDC-0.750-Mean: 78.1452 5.1774 7.0484 0.7935
MDC-0.500-Mean: 79.4444 5.127 7.0952 0.7905
Measures:
Mah.Dist: 0.1029
Mah.Dist-MCD-0.975: 0.5746
Mah.Dist-MCD-0.750: 0.5746
Mah.Dist-MCD-0.500: 0.5793
Zuletzt geändert am 17.02.2013
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