xmp12.06 {Devore6} | R Documentation

## data from Example 12.6

### Description

The `xmp12.06` data frame has 11 rows and 2 columns.

### Format

This data frame contains the following columns:

traffic
  traffic flow (1000's of cars per 24 hours)
lead
  lead content of bark of trees near the highway (ug/g dry wt).

### Source

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

### Examples

    data(xmp12.06)
    plot(lead ~ traffic, data = xmp12.06,
         xlab = "Traffic flow (1000's of cars per 24 hours)",
         ylab = expression(paste(plain("Lead content of tree bark ("),
           mu,plain("g/g dry wt)"))),
         main = "Data from Example 12.6, page 503", las = 1)
    fm1 <- lm(lead ~ traffic, data = xmp12.06)
    abline(fm1)
    summary(fm1)
    opar <- par(mfrow = c(2, 2))
    plot(fm1)
    par(opar)
    ## compare to table on page 503
    cbind(xmp12.06, yhat = fitted(fm1), resid = resid(fm1))
    anova(fm1)

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