shotgun.df: Shotgun data

In dafs: Data Analysis for Forensic Scientists

Shotgun data

Description

In order to test the validity of range-of-fire estimates obtained by the application of regression analysis to shotgun pellet patterns, a blind study was conducted in which questioned pellet patterns were fired at randomly selected ranges between 3.0 and 15.2 m (10 and 50 ft) with two different 12-gauge shotguns. each firing a different type of buckshot cartridge. Test firings at known ranges were also conducted with the same weapons and ammunition.

Usage

data(shotgun.df)

Format

A data frame with 3 variables:

[,1]	range	numeric	the range in feet of the firing
[,2]	sqrt.area	numeric	the square root of the area of the smallest rectangle that would enclose the pellet pattern
[,3]	model	factor	the model of shotgun used in the experiment

Author(s)

J.M. Curran

References

Rowe, W.F. and Hanson, S.R. (1985) Range-of-fire estimates from regression analysis applied to the spreads of shotgun pellet patterns: Results of a blind study, Forensic Science International, 28(3-4): 239-250.

dafs documentation built on April 11, 2022, 5:06 p.m.