Commit Inicial

data/tanveer/titanic/datos_orixinais/titanic/Source/Notes

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+TITANIC DATASET
+
+Converted for use in DELVE by Radford Neal, June 1996.
+Originally compiled by Robert Dawson, 1995.
+
+
+The titanic dataset gives the values of four categorical attributes
+for each of the 2201 people on board the Titanic when it struck an
+iceberg and sank.  The attributes are social class (first class,
+second class, third class, crewmember), age (adult or child), sex, and
+whether or not the person survived.
+
+The question of interest for this natural dataset is how survival
+relates to the other attributes.  There is obviously no practical
+need to predict survival, so the real interest is in interpretation,
+but success at prediction would appear to be closely related to 
+the discovery of interesting features of the relationship.  Note
+that there are only sixteen possible combinations of input attributes
+for this prediction task, so the interesting behaviour will be that
+with small training sets.
+
+
+Source from which the data was obtained.
+
+The original source files are titanic.doc and titanic.dat, which were
+obtained from the data archive of the on-line Journal of Statistics
+Education, whose home page on the Web is at URL
+
+     http://www2.ncsu.edu/ncsu/pams/stat/info/jse/homepage.html
+
+Carriage returns at the end of the lines were deleted, as was a line
+containing a period at the end of each file.  Other than this, the
+titanic.doc and titanic.dat files are as obtained from this source.
+
+The dataset was compiled by Robert J. MacG. Dawson, and discussed by
+him in the on-line article 'The "Unusual Episode" Data Revisited',
+Journal of Statistics Education, vol. 3, no. 3 (1995), available via
+the URL above.
+
+
+Notes on aspects of the data.
+
+As discussed in the article, the dataset was reconstructed from
+sources that were not completely clear, so there are undoubtably some
+errors.
+
+The cases in titanic.dat are clearly in a non-informative order,
+grouped by identical attribute patterns.  This has been retained for
+the DELVE dataset file.  
+
+The representation of attributes has been changed to be more mnemonic.
+
+Prior information regarding the significance of social class is
+somewhat debatable.  In the standard prior, I have considered status
+to be an ordinal variable in which crewmembers come after third class
+passengers.  Perhaps crewmembers should be considered to be outside
+this class ordering altogether, but that is not convenient.

data/tanveer/titanic/datos_orixinais/titanic/Source/titanic.doc

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+
+NAME:  Population at Risk and Death Rates for an Unusual Episode
+TYPE:  Complete record for all of population at risk
+SIZE:  2201 observations, 4 variables
+
+DESCRIPTIVE ABSTRACT:
+For each person on board the fatal maiden voyage of the ocean liner
+Titanic, this dataset records sex, age [adult/child], economic status
+[first/second/third class, or crew] and whether or not that person
+survived.
+
+SOURCE:
+"Report on the Loss of the `Titanic' (S.S.)" (1990), _British Board of
+Trade Inquiry Report_ (reprint), Gloucester, UK: Allan Sutton
+Publishing.
+
+VARIABLE DESCRIPTIONS:
+Column
+   1	 Class (0 = crew, 1 = first, 2 = second, 3 = third)
+  10 	 Age   (1 = adult, 0 = child)
+  19	 Sex   (1 = male, 0 = female)
+  28	 Survived (1 = yes, 0 = no)
+
+Values are aligned and delimited by blanks.  There are no missing
+values.
+
+SPECIAL NOTES:
+There is not complete agreement among primary sources as to the exact
+numbers on board, rescued, or lost.
+
+STORY BEHIND THE DATA:
+The sinking of the Titanic is a famous event, and new books are still
+being published about it.  Many well-known facts--from the proportions
+of first-class passengers to the "women and children first" policy, and
+the fact that that policy was not entirely successful in saving the
+women and children in the third class--are reflected in the survival
+rates for various classes of passenger.  These data were originally
+collected by the British Board of Trade in their investigation of the
+sinking.
+
+PEDAGOGICAL NOTES:
+These data make an interesting exercise if given to a class without
+their context, which the students must attempt to discover.  The
+instructor will probably want to answer questions from the class,
+"Twenty Questions" style.
+
+There is a similar set of data circulating without any detailed
+explanation or compiler's name attached, under the same title, which
+omits the crew (and does not agree with any of the primary sources that
+I was able to find.)  Credit for the original idea goes to the
+originator of that exercise:  my version is merely an attempt to
+provide a more complete context.
+
+Additional information about these data can be found in the "Datasets
+and Stories" article "The `Unusual Episode' Data Revisited" in the
+_Journal of Statistics Education_ (Dawson 1995).  Send the message
+
+	send jse/v3n3/datasets.dawson
+
+to the address archive@jse.stat.ncsu.edu
+
+SUBMITTED BY:
+Robert J. MacG. Dawson
+Department of Mathematics and Computing Science
+Saint Mary's University
+Halifax, Nova Scotia  B3H 3C3
+CANADA
+rdawson@husky1.stmarys.ca

data/tanveer/titanic/datos_orixinais/titanic/Summary

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+The titanic dataset gives the values of four categorical attributes
+for each of the 2201 people on board the Titanic when it struck an
+iceberg and sank.  The attributes are social class (first class,
+second class, third class, or crewmember), age (adult or child), sex,
+and whether or not the person survived.  The question of interest is
+considered to be how survival relates to the other attributes.

data/tanveer/titanic/datos_orixinais/titanic/survived/std.prior

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+1 NLMH ordinal
+2 NLMH binary
+3 NLMH binary
+4 NLMH binary passive=no