Datafiles

ERP_Effectiveness Download .TXT file Open in Data Desk ^?
Methods: Nonparametric Methods, Comparing Two Groups
Source: unknown
Number of Cases: 8
Excerpt: When implementing a packaged Enterprise Resource Planning (ERP) system, many companies report that the module they first install is Financial Accounting. Among the measures used to gauge the effectiveness of their ERP system implementation is acceleration of the financial close process. The data hold a sample of 8 companies that report their average time (in […]

EU_Imports Download .TXT file Open in Data Desk ^?
Methods: Time Series Analysis
Source: Download from the bottom of www.census.gov/foreign-trade/balance/c5700.htm
Number of Cases: 197
Excerpt:

Exam_time Download .TXT file Open in Data Desk ^?
Methods: Hypothesis Tests
Source: invented data
Number of Cases: 20
Excerpt: The instructor of a large math class estimates that at the intended level of difficulty, his undergraduate midterm exams require on average 10 minutes for graduate students in his department to complete. If the average is longer than 10 minutes, then the exam is likely too hard and needs to be revised. As usual, the […]

Exercise_equipment Download .TXT file Open in Data Desk ^?
Methods: Comparing Two Groups
Source: Medicine and Science in Sports and Exercise, 2001
Number of Cases: 24
Excerpt: A leading manufacturer of exercise equipment wanted to collect data on the effectiveness of their equipment. An August 2001 article in the journal Medicine and Science in Sports and Exercise compared how long it would take men and women to burn 200 calories during light or heavy workouts on various kinds of exercise equipment. The […]

Eye_and_Hair_color Download .TXT file Open in Data Desk ^?
Methods: Analysis of Variance, Inference
Source: Student survey
Number of Cases: 1021
Excerpt: Students in a large statistics class were asked to report the eye color and hair color. Is there an association?

F-stops Download .TXT file Open in Data Desk ^?
Methods: Correlation, Re-expression, Scatterplot
Source: http://garsteckphotography.blogspot.com/2011/04/using-manual-settings-must-know.html
Number of Cases: 8
Excerpt: Some camera lenses have an adjustable aperture, the hole that lets the light in. The size of the aperture is expressed in a mysterious number called the f/stop. Each increase of one f/stop number corresponds to a halving of the light that is allowed to come through. When you halve the shutter speed, you cut […]

Farmed_salmon Download .TXT file Open in Data Desk ^?
Methods: Confidence Intervals for Means, Hypothesis Tests, Hypothesis Tests for Means, Statistical Inference
Source: Ronald A. Hites, Jeffery A. Foran, David O. Carpenter, M. Coreen Hamilton, Barbara A. Knuth, and Steven J. Schwager, “Global Assessment of Organic Contaminants in Farmed Salmon,” Science 9 January 2004: Vol. 303, no. 5655, pp. 226–229
Number of Cases: 153
Excerpt: In 2004, a team of researchers published a study of contaminants in farmed salmon. Fish from many sources were analyzed for 14 organic contaminants. The study expressed concerns about the level of contaminants found. One of those was the insecticide mirex, which has been shown to be carcinogenic and is suspected to be toxic to […]

Female_president Download .TXT file Open in Data Desk ^?
Methods: Regression
Source: Ronald A. Hites, Jeffery A. Foran, David O. Carpenter, M. Coreen Hamilton, Barbara A. Knuth, and Steven J. Schwager, “Global Assessment of Organic Contaminants in Farmed Salmon,” Science 9 January 2004: Vol. 303, no. 5655, pp. 226–229
Number of Cases: 16
Excerpt: