Lactic Acid Concentration Measurement Data

Data on the Calibration of an Instrument that Measures Lactic Acid Concentration in Blood, from Afifi and Azen (1979) - comparing the true concentration X with the measured value Y.

data(lactic, package="robustbase")

Format

A data frame with 20 observations on the following 2 variables.

X

True Concentration

Y

Instrument

Source

P. J. Rousseeuw and A. M. Leroy (1987) Robust Regression and Outlier Detection; Wiley, p.62, table 10.

Examples

data(lactic)
summary(lm.lactic <- lm(Y ~., data=lactic))
#> 
#> Call:
#> lm(formula = Y ~ ., data = lactic)
#> 
#> Residuals:
#>     Min      1Q  Median      3Q     Max 
#> -2.4426 -0.7260  0.1444  0.6886  1.9021 
#> 
#> Coefficients:
#>             Estimate Std. Error t value Pr(>|t|)    
#> (Intercept)  0.15948    0.39681   0.402    0.692    
#> X            1.22769    0.04703  26.107 9.28e-16 ***
#> ---
#> Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1
#> 
#> Residual standard error: 1.079 on 18 degrees of freedom
#> Multiple R-squared:  0.9743,	Adjusted R-squared:  0.9728 
#> F-statistic: 681.5 on 1 and 18 DF,  p-value: 9.278e-16
#>