ex0429: Exercise and Walking Time

In Sleuth2: Data Sets from Ramsey and Schafer's "Statistical Sleuth (2nd Ed)"

Exercise and Walking Time

Description

Can active exercise shorten the time it takes an infant to walk alone? Twelve, one week old, male infants from white, middle-class families were randomly allocated to one of two treatment groups. Those in the active-exercise group received stimulation of the walking reflexes during four 3 minute sessions each day from the beginning of the second through the end of the eighth week. Those in the other group received no stimulation.

Usage

ex0429

Format

A data frame with 12 observations on the following 2 variables.

Age

age (months) at which infants first walked alone

Exercise

a factor with levels "Active" and "None"

Source

Ramsey, F.L. and Schafer, D.W. (2002). The Statistical Sleuth: A Course in Methods of Data Analysis (2nd ed), Duxbury.

References

Zelazo, P.R. (1972). Walking in the Newborn, Science 176: 314–315.

Examples

str(ex0429)

Sleuth2 documentation built on Jan. 25, 2024, 3:02 p.m.