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Data Presentation -- One Numerical Variable -- Measures of Spread

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View Resource A Dataset that is 44% Outliers

This article describes a dataset of days in office of US Presidents with outliers that are not mistakes or unusually high or low observations. The data illustrate that outliers need not be errors but could be particularly interesting cases and that data displays may differ in their ability to reveal interesting data structure. Key Words: Inliers; Interpretation in context.

http://www.amstat.org/publications/jse/v13n1/datasets.hayden...
View Resource Average, Standard Deviation and Relative Standard Deviation

This pdf file gives definitions for average, standard deviation, and relative standard deviation, and works through a short problem as an example.

http://www.chem.tamu.edu/class/fyp/mathrev/std-dev.pdf
View Resource Backward Probability Template

Given the population incidence of a certain disease, and the conditional probabilities of positive and negative test results, what are the probabilities for a particular test result of a true positive, true negative, false positive, and false negative? Adaptable to other kinds of conditional situations. Although this page is adaptable to a variety of backward probability situations, its exemplary...

http://faculty.vassar.edu/lowry/pback.html
View Resource Basic Descriptive Statistics Calculator

This page will calculate sample size, mean, median, standard deviation, variance, maximum, minimum, range, and skewness. Data is entered in one row and should be separated by spaces only, with no space after the last entry.

http://glass.ed.asu.edu/stats/analysis/basic.html
View Resource Basic Sample Stats Calculator

The page calculates summary statistics for any dataset. Users will be prompted for sample size when opening this page. The calculator returns mean, sum of X, sum of X^2, variance, standard deviation, and standard error. Key word: Descriptive statistics.

http://faculty.vassar.edu/lowry/basic.html
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