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

In qqtest: Self Calibrating Quantile-Quantile Plots for Visual Testing

Description

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

Usage

pullstrength

Format

A data frame with 7 rows and 4 variates:

strength

Pull strength lower bound in pounds.

nCases

Number of cases observed with pull strength between this bound and the next.

percentCases

Percent of cases observed with pull strength between this bound and the next.

percentCumulative

Cumulative percent of cases observed with pull strength up to this bound.

percentAdjustedCumulative

Adjust Galton's cumulative percent to include only half the cases between this bound and the next.

Details

qqtest(pullstrength$strength, p=pullstrength$percentCumulative/100, np=519, dist="uniform", main="Galton's ogive of pull strength for 519 males aged 23-26", xlab="Cumulative Proportions (Adjusted)",yAxisAsProbs=FALSE, ylab="Strength in lbs.", type="o") will effect Galton's Ogive.

qqtest(pullstrength$strength, p=pullstrength$percentAdjustedCumulative/100, np=519, dist="normal", main="Gaussian qqplot of pull strength for 519 males aged 23-26", xlab="Cumulative Proportions (Adjusted)",yAxisAsProbs=FALSE, ylab="Strength in lbs.", type="o") will effect a normal qqplot for this data.

Source

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

qqtest documentation built on March 26, 2020, 7:57 p.m.