R: Trypsin by age groups

fake.trypsin {ISwR} | R Documentation

## 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)

[Package ISwR version 2.0-7 Index]