xmp06.03 {Devore6} | 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. (2003) Probability and Statistics for Engineering and the Sciences (6th 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)

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