xmp06.03 {Devore5}R Documentation

data from Example 6.3

Description

The xmp06.03 data frame has 8 rows and 1 columns.

Format

This data frame contains the following columns:

Strength
elastic modulus (GPa) of AZ91D alloy specimens from a die-casting process

Source

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

(1998), On the development of a new approach for the determination of yield strength in Mg-based alloys, Light Metal Age, Oct., 50-53.

Examples

data(xmp06.03)
attach(xmp06.03)
stem(Strength)
var(Strength)  # usual (unbiased) estimate of sigma^2
## alternative estimate of sigma^2 with n in denominator
sum((Strength - mean(Strength))^2)/length(Strength)