This repository is a simple mirror of the datasets referenced from NIST/SEMATECH e-Handbook of Statistical Methods. 1 Every file is in the .DAT file format, and specifically formatted for the Dataplot software also created by NIST. 2
For licensing information concerning the datasets, please read NIST's policy. 3
An example dataset (ANSCOMBE.DAT) is shown below. Some files may contain I/O commands for Dataplot, which are specified in the Dataplot Reference Manual. 4
ANSCOMBE'S GRAPHICS VERSUS STATISTICS DATA
(WITH THANKS TO KEITH EBERHARDT AT NIST)
NUMBER OF OBSERVATIONS = 11
NUMBER OF VARIABLES = 8
ORDER OF VARIABLES ON A LINE IMAGE--
X1 Y1 X2 Y2 X3 Y3 X4 Y4
NOTE--THESE 4 DATA SETS ARE DIFFERENT IN GRAPHICAL STRUCTURE
BUT HAVE THE FOLLOWING IDENTICAL STATISTICS--
SAMPLE SIZE = 11
MEAN OF X'S = 9.0
MEAN OF Y'S = 7.5
INTERCEPT = 3.0
SLOPE = 0.5
RESID. STAND. DEV. = 1.125
CORR. COEFFICIENT = 81.7%
SOURCE--ANSCOMBE, FRANK J. (1973). "GRAPHS IN STATISTICAL ANALYSIS"
AMERICAN STATISTICIAN, VOL. 27, FEBRUARY 1973.
TO READ THIS FILE INTO DATAPLOT (& ANALYZE)--
SKIP 25
READ ANSCOMBE.DAT X1 Y1 X2 Y2 X3 Y3 X4 Y4
CHARACTERS X; LINES BLANK
MULTIPLOT 2 2
PLOT Y1 X1; PLOT Y2 X2; PLOT Y3 X3; PLOT Y4 X4
X1 Y1 X2 Y2 X3 Y3 X4 Y4
-------------------------------------------------------------------
10.00 8.04 10.00 9.14 10.00 7.46 8.00 6.58
8.00 6.95 8.00 8.14 8.00 6.77 8.00 5.76
13.00 7.58 13.00 8.74 13.00 12.74 8.00 7.71
9.00 8.81 9.00 8.77 9.00 7.11 8.00 8.84
11.00 8.33 11.00 9.26 11.00 7.81 8.00 8.47
14.00 9.96 14.00 8.10 14.00 8.84 8.00 7.04
6.00 7.24 6.00 6.13 6.00 6.08 8.00 5.25
4.00 4.26 4.00 3.10 4.00 5.39 19.00 12.50
12.00 10.84 12.00 9.13 12.00 8.15 8.00 5.56
7.00 4.82 7.00 7.26 7.00 6.42 8.00 7.91
5.00 5.68 5.00 4.74 5.00 5.73 8.00 6.89
Footnotes
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NIST/SEMATECH e-Handbook of Statistical Methods, https://www.itl.nist.gov/div898/handbook/datasets.htm, July 11, 2023. ↩
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Heckert, A. (2001, June 5). Dataplot frequently asked questions (FAQS). NIST Electrical Engineering Division. https://www.itl.nist.gov/div898/software/dataplot/faqs.htm#datafaq2 ↩
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Copyright, fair use, and licensing statements for SRD, data, software, and Technical Series Publications. NIST. (2023, June 1). https://www.nist.gov/open/copyright-fair-use-and-licensing-statements-srd-data-software-and-technical-series-publications ↩
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Heckert, A. (2001, June 5). Dataplot Reference Manual: Volume 1. NIST Electrical Engineering Division. https://www.itl.nist.gov/div898/software/dataplot/refman1/homepage.htm ↩