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8.2.45.76 octave.dataset.USArrests ¶

Static Method: out = USArrests () ¶

Violent Crime Rates by US State

Description ¶

This data set contains statistics, in arrests per 100,000 residents for assault, murder, and rape in each of the 50 US states in 1973. Also given is the percent of the population living in urban areas.

Format ¶

State

State name.

Murder

Murder arrests (per 100,000).

Assault

Assault arrests (per 100,000).

UrbanPop

Percent urban population.

Rape

Rape arrests (per 100,000).

Note ¶

USArrests contains the data as in McNeil’s monograph. For the UrbanPop percentages, a review of the table (No. 21) in the Statistical Abstracts 1975 reveals a transcription error for Maryland (and that McNeil used the same “round to even” rule), as found by Daniel S Coven (Arizona).

See the example below on how to correct the error and improve accuracy for the ‘<n>.5’ percentages.

Source ¶

World Almanac and Book of Facts 1975. (Crime rates).

Statistical Abstracts of the United States 1975, p.20, (Urban rates), possibly available as https://books.google.ch/books?id=zl9qAAAAMAAJ&pg=PA20.

References ¶

McNeil, D. R. (1977). Interactive Data Analysis. New York: Wiley.

Examples ¶

t = octave.dataset.USArrests;

summary (t);

octave.examples.plot_pairs (t(:,2:end));

# TODO: Difference between USArrests and its correction

# TODO: +/- 0.5 to restore the original <n>.5 percentages