pullstrength


From measurements made by Francis Galton at the International Health Exhibition in 1884.


datasets

Provides the function qqtest which incorporates uncertainty in its
qqplot display(s) so that the user might have a better sense of the
evidence against the specified distributional hypothesis.  qqtest draws a
quantile quantile plot for visually assessing whether the data come from a
test distribution that has been defined in one of many ways.  The vertical
axis plots the data quantiles, the horizontal those of a test distribution.
The default behaviour generates 1000 samples from the test distribution and
overlays the plot with shaded pointwise interval estimates for the ordered
quantiles from the test distribution.  A small number of independently
generated exemplar quantile plots can also be overlaid.  Both the interval
estimates and the exemplars provide different comparative information to
assess the evidence provided by the qqplot for or against the hypothesis
that the data come from the test distribution (default is normal or
gaussian).  Finally, a visual test of significance (a lineup plot) can also
be displayed to test the null hypothesis that the data come from the test
distribution.

Wayne Oldford

qqtest

Self Calibrating Quantile-Quantile Plots for Visual Testing

pullstrength function

A data frame with 7 rows and 4 variates:
<dl>
  <dt>strength</dt><dd>Pull strength lower bound in pounds.</dd> <dt>nCases</dt><dd>Number of cases observed with pull strength between this bound and the next.</dd> <dt>percentCases</dt><dd>Percent of cases observed with pull strength between this bound and the next.</dd> <dt>percentCumulative</dt><dd>Cumulative percent of cases observed with pull strength up to this bound.</dd> <dt>percentAdjustedCumulative</dt><dd>Adjust Galton's cumulative percent to include only half  the cases between this bound and the next.</dd> </dl>

Format

"Natural Inheritance", 
Francis Galton, (1889), Table 1, page 199.

pullstrength: Strength of pull for 519 males aged 23-26.

Description

Usage

Arguments

Format

Source

Details