Data set from the Statistical Reference Datasets.
File Name: numacc4.dat
File Format: ASCII
Header : lines 1 to 60 (= 60)
Certified Values: lines 41 to 43 (= 3)
Data : lines 61 to 1061 (= 1001)
Dataset Name: Numerical-Accuracy-4
Description: This is a constructed/fabricated data set
to test accuracy in summary statistic calculations.
The numbers are 9-digit floating point values and
differ only in the last decimal place.
sample mean = 10000000.2 (exact)
sample standard dev. = 0.1 (exact)
sample autocorr. coef. = -0.999 (exact)
Stat Category: Univariate
Reference: Simon, Stephen D. and Lesage, James P. (1989).
Assessing the Accuracy of ANOVA Calculations
in Statistical Software", Computational
Statistics & data Analysis, 8, pp. 325-332.
Data: Constructed
1 Response : y
0 Predictors
1001 Observations
Model: Higher Level of Difficulty
2 Parameters : mu, sigma
1 Response Variable : y
0 Predictor Variables
y = mu + e
Certified Values
Sample Mean ybar: 10000000.2 (exact)
Sample Standard Deviation (denom. = n-1) s: 0.1 (exact)
Sample Autocorrelation Coefficient (lag 1) r(1): -0.999 (exact)
Number of Observations: 1001
Data: Y
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