Method: Assumptions, Regression

Methods: Assumptions, Regression, Diagnostics, Simple Linear Regression, Scatterplot,
Topics: Science,
Datafile Name: Chromatography
Abstract:

Results of a study of gas chromatography, a technique which is used to detect very small amounts of a substance. Five measurements were taken for each of four specimens containing different amounts of the substance. The amount of the substance in each specimen was determined before the experiment...

Methods: Assumptions, Regression, Outlier, T-test, Boxplot, Diagnostics, Multivariate Regression,
Topics: Economics,
Datafile Name: OECD Economic Development
Abstract:

Data on per capita income and the percentages of the labor force employed in agriculture, industry, and service occupations for 20 Eurpoean OECD countries lend themselves to several kinds of analysis. Univariate analysis of each of the variables is interesting, and the relations between per capit...

Methods: Transformation, Regression, Assumptions, Regression,
Topics: Miscellaneous,
Datafile Name: Transformations
Abstract:

Four sets of data are presented in which the relation between X and Y is not best described as linear in the original numbers. Therefore, some transformation of X, Y, or both is appropriate. Suggestions are log Y, log X, log Y and log X, 1/Y, and 1/X. Two of the sets can be described as learning ...

Methods: Assumptions, Regression, Outlier, T-test, Boxplot, Diagnostics, Multivariate Regression,
Topics: Economics,
Datafile Name: OECD Economic Development
Abstract:

The Datafile OECD Economic Develpment  contains per capita income (PCINC)
and the percentage of the labor force employed in agriculture (AGR) for 20 European
OECD countries in 1960. Below are the same variables for the United States by 
decades with PCINC adjusted t...

Methods: Assumptions, Regression, Regression, Partial Regression Plot, Polynomial Regression, Smoothing,
Topics: Environment, Weather,
Datafile Name: US Temperatures
Abstract:

The data gives the normal average January minimum temperature in degrees Fahrenheit with the latitude and longitude of 56 U.S. cities. (For each year from 1931 to 1960, the daily minimum temperatures in January were added together and divided by 31. Then, the averages for each year were averaged ...

Methods: Regression, Outlier, Collinearity, Assumptions, Regression,
Topics: Economics, Social Science,
Datafile Name: Wages and Hours
Abstract:

The data are from a national sample of 6000 households with a male head and earnings of less than $15,000 annually in 1966. Thirty-nine demographic subgroups were formed for analysis of the relation between average hours worked during the year and average hourly wages and other variables. The stu...

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