hellung


Data frame concerned with growth conditions of <em>Tetrahymena</em> 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. 


datasets

Provides directly interpretable estimated coefficients
for four models in connection with the two-group straight line
ANCOVA problem: (A) the full model, which requires the fitting of
two intercepts and two slopes; (B) a reduced model, which requires
the fitting of a single intercept and single slope; (C) a reduced
model, which requires the fitting of two separate intercepts and a
single, common slope; and (D) a reduced model, which requires the
fitting of a single, common intercept and two separate slopes.  The
summary function provides tests of fit for the (null) hypotheses of:
(1) equivalent data sets, (2) equivalent slopes, and
(3) equivalent intercepts.

W Gregory Alvord

Two-Group Straight Line ANCOVA

hellung function

A data frame with 51 observations on the following 3 variables.
  <dl> </dl> 

Format

Dalgaard P (2002) <em>Introductory Statistics with R</em>. Springer. pp. 172-182.

hellung: hellung - data frame

Description

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Examples