hellung: hellung - data frame

In sla: Two-Group Straight Line ANCOVA

Description

Data frame concerned with growth conditions of Tetrahymena cells, collected by Per Hellung-Larsen. Data are from two groups of cell cultures where glucose was either added or not added to the growth medium. For each culture the average cell diameter and cell concentration were recorded.

Usage

data("hellung")

Format

A data frame with 51 observations on the following 3 variables.

glucose

a factor with levels Yes No

conc

a numeric vector

diameter

a numeric vector

Details

A plot of the diameter by concentration data reveals that the data are distributed exponentially. For interest with two-group, straight line ANCOVA the raw conc and diameter values should be transformed to their common logs. Cf. hellunglog data frame in this package.

Source

Dalgaard P (2002) Introductory Statistics with R. Springer. pp. 172-182.

References

Dalgaard P (2002) Introductory Statistics with R. Springer.

Examples

data(hellung) # cf. hellunglog data frame

Example output

sla documentation built on May 30, 2017, 2:39 a.m.