xmp01.02 {Devore6} | R Documentation

## data from Example 1.2

### Description

The `xmp01.02` data frame has 27 rows and 1 column of flexural strengths of concrete.

### Format

This data frame contains the following columns:

strength
  a numeric vector of flexural strengths (MegaPascals)

### Details

Data on the flexural strength (MPa) of high-performance concrete beams obtained by using superplasticizers and certain binders.

### Source

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

(1997) "Effects of aggregates and microfillers on the flexural properties of concrete", Magazine of Concrete Research, 81–98.

### Examples

    data(xmp01.02)
    attach(xmp01.02)
    hist(strength, xlab = "Flexural strength (MPa)",
         col = "lightgray")
    rug(strength)
    summary(strength)
    boxplot(strength, col = "lightgray", notch = TRUE,
            ylab = "Flexural strength (MPa)",
            main = "Boxplot of strength",
            sub =
    "Notches show a 95% confidence interval on the median strength")
    detach()

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