On this Picostat.com statistics page, you will find information about the plasma data set which pertains to Blood Screening Data . The plasma data set is found in the HSAUR R package. You can load the plasma data set in R by issuing the following command at the console data("plasma"). This will load the data into a variable called plasma. If R says the plasma data set is not found, you can try installing the package by issuing this command install.packages("HSAUR") and then attempt to reload the data. If you need to download R, you can go to the R project website. You can download a CSV (comma separated values) version of the plasma R data set. The size of this file is about 636 bytes.
Blood Screening Data
The erythrocyte sedimentation rate and measurements of
two plasma proteins (fibrinogen and globulin).
A data frame with 32 observations on the following 3 variables.
the fibrinogen level in the blood.
the globulin level in the blood.
the erythrocyte sedimentation rate, either less or
greater 20 mm / hour.
The erythrocyte sedimentation rate (ESR) is the rate at which
red blood cells (erythrocytes) settle out of suspension in blood
plasma, when measured under standard conditions. If the ESR increases
when the level of certain proteins in the blood plasma rise in
association with conditions such as rheumatic diseases, chronic
infections and malignant diseases, its determination might be
useful in screening blood samples taken form people suspected
to being suffering from one of the conditions mentioned. The
absolute value of the ESR is not of great importance rather it
is whether it is less than 20mm/hr since lower values indicate
a healthy individual.
The question of interest is whether there is any association
between the probability of an ESR reading greater than 20mm/hr
and the levels of the two plasma proteins. If there is not then
the determination of ESR would not be useful for diagnostic purposes.
D. Collett and A. A. Jemain (1985),
Residuals, outliers and influential observations in regression
analysis. Sains Malaysiana, 4, 493–511.
data("plasma", package = "HSAUR")
layout(matrix(1:2, ncol = 2))
boxplot(fibrinogen ~ ESR, data = plasma, varwidth = TRUE)
boxplot(globulin ~ ESR, data = plasma, varwidth = TRUE)
Dataset imported from https://www.r-project.org.