Method: Summary Statistics

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

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: Outlier, Summary Statistics, Mean, Median, Histogram, Boxplot,
Topics: Miscellaneous,
Datafile Name: Distribution Patterns
Abstract:

This "story" illustrates some of the different distribution patterns that variables may take on. The distribution of Tobin's Q-ratios for firms shows high positive skewness. Sometimes this can be 'remedied' by taking the logarithms of the data. Try this for the Q-ratios. Oth...

Methods: Summary Statistics,
Topics: Consumer,
Datafile Name: Shoppers
Abstract:

A marketing consultant observed 50 consecutive shoppers at a grocery store, and recorded how much money each shopper spent in the store. Descriptive statistics such as mean, median, standard deviation, and interquartile range, as well as graphical methods such as boxplots or dotplots, may be used...

Methods: Median, Efficiency, Summary Statistics,
Topics: Social Science, Sociology,
Datafile Name: Rain Forest
Abstract:

Between September 15, 1986 and October 18, 1987 two researchers recorded when each resident of the Gwaimasi village (in a rain forest of New Guinea) left and returned to the village. Upon their return from a hunting trip, the amount of edible food of various types captured by each resident was re...

Methods: Two Sample T-Test, Summary Statistics,
Topics: Education,
Datafile Name: DRP Scores
Abstract:

An educator conducted an experiment to test whether new directed reading activities in the classroom will help elementary school pupils improve some aspects of their reading ability. She arranged for a third grade class of 21 students to follow these activities for an 8-week period. A control cla...

Methods: Summary Statistics, T-test,
Topics: Environment,
Datafile Name: Refinery
Abstract:

An oil refinery northeast of San Francisco conducted a series of 31 daily measurements of the carbon monoxide levels arising from one of their stacks between April 16 and May 16, 1993. The measurements were submitted as evidence for establishing a baseline to the Bay Area Air Quality Management D...

Methods: T-test, Outlier, Boxplot, Mann Whitney U Test, Summary Statistics,
Topics: Health, Medical,
Datafile Name: Nursing Home Data
Abstract:

Acorn is the acronym for Association of Community Organizations for Reform Now.
These data were presented by Acorn to a Joint Congressional Hearing on discri-
mination in lending.  Acorn concluded that "banks generally have exhibited a per-
vasive pattern of lending...

Methods: Outlier, Boxplot, T-test, Summary Statistics,
Topics: Consumer, Economics, Finance,
Datafile Name: Refusals in Mortgage Lending
Abstract:

Acorn is the acronym for Association of Community Organizations for Reform Now. These data were presented by Acorn to a Joint Congressional Hearing on discri- mination in lending. Acorn concluded that "banks generally have exhibited a per- vasive pattern of lending practices that have the ef...

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

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: Mean, Summary Statistics,
Topics: Psychology, Social Science,
Datafile Name: Popular Kids
Abstract:

The subjects, students in grades 4-6 in selected schools in Michigan, were asked the following question:

Which of the following would make you popular among your friends? Rank in order.

A. Make good grades.

B. Having lots of money.

C. Being good at sports.<...

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