xmp12.01 {Devore6} | R Documentation

## data from Example 12.1

### Description

The `xmp12.01` data frame has 30 rows and 2 columns.

### Format

This data frame contains the following columns:

palprebal
  width of the palprebal fissure (cm).
OSA
  Ocular Surface Area, a measure of vertical gaze direction (cm^2).

### Details

These are data from an experiment relating the vertical gaze direction, as measured by the ocular surface area, to the width of the palprebal fissure (horizontal width of the eye opening).

### Source

Devore, J. L. (2003) Probability and Statistics for Engineering and the Sciences (6th ed), Duxbury

(1996), ``Analysis of ocular surface area for comfortable VDT workstation layout'', Ergometrics, 877-884.

### Examples

    data(xmp12.01)
    plot(OSA ~ palprebal, data = xmp12.01,
         xlab = "Palprebal fissure width (cm)",
         ylab = expression(paste(plain("Occular surface area (cm")^2,
                   plain(")"))),
         main = "Data from Example 12.1, page 490", las = 1)
    summary(xmp12.01)
    fm1 <- lm(OSA ~ palprebal, data = xmp12.01)
    summary(fm1)
    abline(fm1)
    opar <- par(mfrow = c(2,2))
    plot(fm1)
    par(opar)

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