## Elastic Band Data Replicated Again

### Description

The `elastic2`

data frame has 9 rows and 2 columns
giving, for each amount by which an elastic band is stretched
over the end of a ruler, the distance that the band traveled when
released.

### Usage

elastic2

### Format

This data frame contains the following columns:

- stretch
the amount by which the
elastic band was stretched

- distance
the distance traveled

### Source

J. H. Maindonald

### Examples

plot(elastic2)
pause()
print("Chapter 5 Exercise")
yrange <- range(c(elastic1$distance, elastic2$distance))
xrange <- range(c(elastic1$stretch, elastic2$stretch))
plot(distance ~ stretch, data = elastic1, pch = 16, ylim = yrange, xlim =
xrange)
points(distance ~ stretch, data = elastic2, pch = 15, col = 2)
legend(xrange[1], yrange[2], legend = c("Data set 1", "Data set 2"), pch =
c(16, 15), col = c(1, 2))
elastic1.lm <- lm(distance ~ stretch, data = elastic1)
elastic2.lm <- lm(distance ~ stretch, data = elastic2)
abline(elastic1.lm)
abline(elastic2.lm, col = 2)
summary(elastic1.lm)
summary(elastic2.lm)
pause()
predict(elastic1.lm, se.fit=TRUE)
predict(elastic2.lm, se.fit=TRUE)