irr (version 0.84.1)

vision: Eye-testing case records

Description

Case records of the eye-testing of N=7477 female employees in Royal Ordnance factories between 1943 and 1946. Data were primarily used by Stuart (1953) to illustrate the the estimation and comparison of strengths of association in contingency tables.

Usage

data(anxiety)

Format

A data frame with 7477 observations (eye testing results with levels 1st grade, 2nd grade, 3rd grade, 4th Grade) on the following 2 variables.

r.eye

unaided distance vision performance of the right eye

l.eye

unaided distance vision performance of the left eye

References

Stuart, A. (1953). The Estimation and Comparison of Strengths of Association in Contingency Tables. Biometrika, 40, 105-110.

Examples

# NOT RUN {
data(vision)
table(vision$r.eye, vision$l.eye)
# }