Between May 1934 and July 1935, the National Bureau of Standards in
Washington D.C. conducted a series of experiments to estimate the
acceleration due to gravity, g, at Washington. Each experiment
produced a number of replicate estimates of g using the same
methodology. Although the basic method remained the same for all
experiments, that of the reversible pendulum, there were changes in
configuration.
The gravity data frame contains the data from all eight
experiments. The grav data frame contains the data from the
experiments 7 and 8. The data are expressed as deviations from 980.000
in centimetres per second squared.
Usage
gravity
Format
This data frame contains the following columns:
g
The deviation of the estimate from 980.000 centimetres per second squared.
series
A factor describing from which experiment the estimate was derived.
Source
The data were obtained from
Cressie, N. (1982) Playing safe with misweighted means.
Journal of the American Statistical Association, 77, 754–759.
References
Davison, A.C. and Hinkley, D.V. (1997)
Bootstrap Methods and Their Application. Cambridge University Press.