Cloud point of a Liquid

This data set contains the measurements concerning the cloud point of a Liquid, from Draper and Smith (1969). The cloud point is a measure of the degree of crystallization in a stock.

data(cloud, package="robustbase")

Format

A data frame with 19 observations on the following 2 variables.

Percentage

Percentage of I-8

CloudPoint

Cloud point

Source

P. J. Rousseeuw and A. M. Leroy (1987) Robust Regression and Outlier Detection; Wiley, p.96, table 10.

Examples

data(cloud)
summary(lm.cloud <- lm(CloudPoint ~., data=cloud))
#> 
#> Call:
#> lm(formula = CloudPoint ~ ., data = cloud)
#> 
#> Residuals:
#>     Min      1Q  Median      3Q     Max 
#> -1.4464 -0.4282  0.1809  0.6127  0.9718 
#> 
#> Coefficients:
#>             Estimate Std. Error t value Pr(>|t|)    
#> (Intercept) 23.34638    0.29675   78.67  < 2e-16 ***
#> Percentage   1.04546    0.05516   18.95 7.18e-13 ***
#> ---
#> Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1
#> 
#> Residual standard error: 0.7372 on 17 degrees of freedom
#> Multiple R-squared:  0.9548,	Adjusted R-squared:  0.9522 
#> F-statistic: 359.3 on 1 and 17 DF,  p-value: 7.182e-13
#>