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Aiken High School
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Data Set/Description Owner Last edited Size Views
Reading comprehension
See Subject: Subject number Group: Type of instruction that student received (Basal, DRTA, or Strat) PRE1: Pretest score on first reading comprehension measure PRE2: Pretest score on second reading comprehension measure POST1: Posttest score on first reading comprehension measure POST2: Posttest score on second reading comprehension measure POST3: Posttest score on third reading comprehension measure
worths1Oct 13, 20121KB212
Population in U.Sworths1Sep 24, 2012412B302
Proportion with teeth removed
The proportions of seniors (65+) with all natural teeth removed as of 2010.
worths1Mar 21, 2012915B269
Weekly DJIAworths1Sep 13, 20118KB62
Forbes Wealthiest 100
Data retrieved on 9/8/2011
worths1Sep 8, 20115KB290
State Motor-Fuel Tax Rates for 2000worths1Aug 30, 2011807B31
Fraction of conservative votes
This table shows the fraction of conservative votes by 43 US Supreme Court Justices as calculated by Landes and Posner in their paper, Rational Judicial Behavior. Paper has additional indices of ideology. Name: Justice's last name Party: Party of President first appointing FCV-All: Fraction of Conservative Votes in all cases Order: Order of first appointment to Supreme Court
worths1May 19, 2010856B115
Hamburger fat and calories
Compiled from site on 11/13/09
worths1Nov 13, 20091.008B67
Healthcare costs as % of GDP
Data from selected countries in 2006, except where noted.
worths1Oct 12, 2009395B56
NBA Free throws 2008-2009worths1Oct 12, 200918KB211
CEO Salaries (2007)
Top 25 CEO salaries in 2007 according to Forbes magazine
worths1Mar 26, 20091KB139
Singfat Chu diamond ring data
NAME: Diamond Ring Pricing Using Linear Regression TYPE: Random sample SIZE: 48 observations, 2 variables DESCRIPTIVE ABSTRACT: This dataset contains the prices of ladies' diamond rings and the carat size of their diamond stones. The rings are made with gold of 20 carats purity and are each mounted with a single diamond stone. SOURCE: The source of the data is a full page advertisement placed in the _Straits Times_ newspaper issue of February 29, 1992, by a Singapore-based retailer of diamond jewelry. VARIABLE DESCRIPTIONS: Columns 6 - 8 Size of diamond in carats (1 carat = .2 gram) 16 - 19 Price of ring in Singapore dollars Values are aligned and delimited by blanks. There are no missing values. STORY BEHIND THE DATA: Data presented in a newspaper advertisement suggest the use of simple linear regression to relate the prices of diamond rings to the weights of their diamond stones. The intercept of the resulting regression line is negative and significantly different from zero. This finding raises questions about an assumed pricing mechanism and motivates consideration of remedial actions. PEDAGOGICAL NOTES: This dataset can be used to illustrate model-building in linear regression. A possibly counter-intuitive negative intercept may be avoided by using a multiplicative or exponential regression model. These regression models are intrinsically linear, and they are estimated using standard linear regression technology after a suitable transformation of the data. Additional information about these data can be found in the "Datasets and Stories" article "Diamond Ring Pricing Using Linear Regression" in the _Journal of Statistics Education_ (Chu 1996). SUBMITTED BY: Singfat Chu Department of Decision Sciences National University of Singapore 10 Kent Ridge Crescent Singapore 119260
worths1Oct 29, 20081KB839
Gompertz's Law Story
worths1Oct 22, 20073KB121
Egg story (DASL)
A single can of dried eggs was stirred well. Samples were drawn and a pair of samples (claimed to be of two "types"), was sent to each of six commercial laboratories to be analyzed for fat content. Each laboratory assigned two technicians, who each analyzed both "types". Since the data were all drawn from a single well-mixed can, the null hypothesis for ANOVA that the mean fat content of each sample is equal is true. The experiment is thus really a study of the laboratories. The dependent variable is the fat contents measured by each technician for each sample. The factors in the design are laboratory, technician, and "type". The experiment is a hierarchical design. In each of the six laboratories, two technicians examined the fat content of the eggs, but the technicians in each lab were different, so "Technicians" are nested within "Lab". Each sample was analyzed by only one technician, so "Sample" is nested within "Technician" (and Lab). Hierarchical designs of this sort are often analyzed using Sequential Sums of Squares. The ANOVA is shows significant differences, but a dotplot of the residuals by laboratory reveals that the significant F-test for laboratory is due almost entirely to laboratory 1 where there was great variability, and where, in particular technician 2, obtained poor results.
worths1Sep 17, 2007718B173


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