fake.trypsin {ISwR}

Trypsin by age groups

Description

The trypsin data frame has 271 rows and 3 columns. Serum levels of immunoreactive trypsin in healthy volunteers (faked!).

Usage

fake.trypsin

Format

This data frame contains the following columns:

trypsin

a numeric vector, serum-trypsin in ng/ml.

grp

a numeric vector, age coding. See below.

grpf

a factor with levels 1: age 10–19, 2: age 20–29, 3: age 30–39, 4: age 40–49, 5: age 50–59, and 6: age 60–69.

Details

Data have been simulated to match given group means and SD.

Source

D.G. Altman (1991), Practical Statistics for Medical Research, Table 9.12, Chapman & Hall.

Examples

plot(trypsin~grp, data=fake.trypsin)