eyegrade {faraway}

grading of eye pairs for distance vision

Description

A sample of women are rated for the performance of distance vision in each eye.

Format

A data frame with 16 observations on the following 3 variables.

y

the observed count

right

rated vision in the right eye - a factor with levels best second third worst

left

rated vision in the left eye - a factor with levels best second third worst

Source

A. Stuart (1955) A test for homogeneity of the marginal distributions in a two-way classification, Biometrika, 42, 412-416.