Method: Distribution

Methods: ANCOVA, Distribution, Interaction, Transformation,
Topics: Economics,
Datafile Name: Billionaires 92

Fortune magazine publishes a list of the world's billionaires each year. The 1992 list includes 233 individuals. Their wealth, age, and geographic location (Asia, Europe, Middle East, United States, and Other) are reported.

The variable 'wealth' is right skewed, so the mean ...

Methods: Outlier, Histogram, Mean, Median, Boxplot, Distribution,
Topics: Economics,
Datafile Name: CEO Salaries

Forbes magazine published data on the best small firms in 1993. These were firms with annual sales of more than five and less than $350 million. Firms were ranked by five-year average return on investment. The data extracted are the age and annual salary of the chief executive officer for the fir...

Methods: Distribution, Histogram,
Topics: Miscellaneous,
Datafile Name: Militiamen Chests

These data summarize the chest sizes of Scottish militiamen in the early 19th century. Chest sizes are measured in inches, and each observation reports the number of soldiers with that chest size. A histogram of chest sizes shows an approximately normal curve. Notice that the histogram must be dr...

Methods: Distribution, Histogram, Summary Statistics,
Topics: Physics, Science,
Datafile Name: Cavendish

In 1798, Henry Cavendish estimated the density of the earth by using a torsion balance. The "Cavendish" dataset contains his 29 measurements of the density of the earth, presented as a multiple of the density of water. The average measurement is 5.42, suggesting that the density of the ...

Methods: Confidence Interval, Distribution, Histogram, Outlier,
Topics: Science,
Datafile Name: Speed of Light

Simon Newcomb measured the time required for light to travel from his laboratory on the Potomac River to a mirror at the base of the Washington Monument and back, a total distance of about 7400 meters. These measurements were used to estimate the speed of light.

A histogram or dotplot o...

Methods: Boxplot, Dotplot, Distribution, Summary Statistics,
Topics: Geography, Government,
Datafile Name: New Jersey

This datafile, containing the area in square miles of each county in New Jersey, may be used to illustrate basic descriptive statistics. The file contains only 21 observations, so students may even calculate means, medians, etc. by hand if desired. A boxplot or dotplot is a good graphical summary...

Methods: Distribution, Median, Probability, Histogram,
Topics: Automotive, Engineering,
Datafile Name: U.S. Vehicle Weights, '75-'90

Frequency distributions are given for the weights of cars, trucks, and light duty vehicles sold in the United States in 1975 and in 1990. The class intervals are not the same through the entire listing, however. This creates problems in plot- ting frequency polygons. These will be a correct inter...

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