belt {cat}

Data on driver injury and seat belt use

Description

Data on driver injury and seat belt use.

Usage

data(belt)

Format

The data frame belt.frame contains the following columns:

I

Injury to driver (I1=Reported by police, I2=Follow up

B

Belt use (B1=Reported by police, B2=Follow up

D

Damage to vehicle (high, low)

S

Sex: Male or Female

Freq

Count

Note

A matrix belt with similarly named columns exists that can be input directly to functions which do not admit data frames. Both the data frame and matrix include all complete and incomplete cases, from the police reports and follow up study.

Source

Schafer (1996) Analysis of Incomplete Multivariate Data. Chapman & Hall, Section 7.4.3, which cites

Hochberg, Y. (1977) On the use of double sampling schemes in analyzing categorical data with misclassification errors, JASA, vol. 71, p. 914-921.