xmp09.10 {Devore5}R Documentation

data from Example 9.10

Description

The xmp09.10 data frame has 16 rows and 3 columns.

Format

This data frame contains the following columns:

t1.min
modulus of elasticity (MPa) obtained 1 minute after loading on Scotch pine lumber specimens.
t4.wks
modulus of elasticity (MPa) obtained 4 weeks after loading on Scotch pine lumber specimens.
Difference
a numeric vector of the differences in the modulus of elasticity (MPa)

Details

This is an extended version of the data from Example 7.11.

Source

Devore, J. L. (2000) Probability and Statistics for Engineering and the Sciences (5th ed), Duxbury

(1996), Time-dependent bending properties of lumber, J. of Testing and Evaluation, 187-193.

See Also

xmp07.11

Examples

data(xmp09.10)
boxplot(xmp09.10[, c("t1.min", "t4.wks")],
     main = "Data from Example 9.10")
attach(xmp09.10)
## compare to Figure 9.7, page 379
qqnorm(Difference, main = "Differences from Example 9.10",
       ylab = "Difference in modulus of elasticity")
qqline(Difference)
t.test(Difference, conf = 0.99)
t.test(t1.min, t4.wks, paired = TRUE, conf = 0.99) # same thing
detach()

[Package Contents]