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14440CAUSEweb.orgen-useditor@causeweb.orgwebmaster@causeweb.orgWed, 16 Apr 2014 12:00:00 -0400Sat, 29 Jun 2013 12:00:00 -0400http://www.rssboard.org/rss-2-0-1Cartoon: Scatterplot Outlier
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=2031A cartoon to teach about outliers in scatterplots. The cartoon is #114 in the "Life in Research" series at www.vadio.com. Free to use with attribution in the classroom or on course websites.Thu, 18 Mar 2010 06:18:52 -0400Cartoon: More Data
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=2030
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=2030A cartoon that might be used in discussing excessive interim analyses. The cartoon is #24 in the "Life in Research" series at www.vadio.com. Free to use with attribution in the classroom or on course websites.Thu, 18 Mar 2010 06:17:07 -0400Cartoon: A Fruitful Example
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1865A cartoon suitable for use in teaching about scatterplots and correlation. The cartoon is number 388 from the webcomic series at xkcd.com created by Randall Munroe. Free to use in the classroom and on course web sites under a creative commons attribution-non-commercial 2.5 license.Tue, 17 Feb 2009 09:33:37 -0500World Development Chart
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1438This scatterplot lets users plot a number of demographic variables and see the log transformation of those variables for numerous countries and income groups. Users can also see the information for any year from 1975 to 2004.Mon, 31 Jul 2006 12:15:01 -0400**National Library of Virtual Manipulatives: Scatterplot
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1143This Java Applet of a scatterplot allows you to enter data, move data points, define the range of values, and view graph value information.Fri, 26 Aug 2005 04:56:22 -0400Investigating Home Court Advantage
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1074This article presents data from 1997 Big Ten Conference men's basketball games involving the University of Iowa Hawkeyes. The data can be used to demonstrate bivariate statistical inference techniques such as confidence regions, paired comparisons, and simultaneous confidence intervals. Key Word: Bivariate data; Scatterplot.Tue, 26 Jul 2005 01:54:34 -0400Statistics at Square One: Correlation and Regression
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1051This section of an online textbook discusses the correlation coefficient and illustrated it visually through graphs. It explains calculations as well as how scatter plots can describe data. It covers significance tests for relationships, the Spearman rank correlation and the regression equation. Exercises and answers are included.Fri, 15 Jul 2005 03:51:22 -0400**Guess the Correlation Applet
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1443This applet generates a scatterplot each time the user clicks "New Sample". Users can then guess the correlation from the graph and see the actual value. By clicking "Edit data" users can input their own data. Users can also determine the number of points in the plot.Mon, 20 Jun 2005 01:27:33 -0400Least Squares Regression Applet
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1444This applet shows a scatterplot of height versus foot length. Users can add or delete points and then guess the regression line by clicking "Your Line" and moving the blue regression line. By clicking "Regression Line" users can see the actual regression line. The applet also shows the correlation and R-square for the data as well as the residuals and squared residuals for the guessed regression line and the actual regression line.Mon, 20 Jun 2005 01:27:33 -0400Quantitative Environmental Learning Project
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=988
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=988This site provides numerous datasets for graphical display topics including linear, exponential, logistic, power rule, periodic, and other bivariate scatterplots, histograms, and other univariate data. Each data set is accompanied with a description, file format options, and a sample graph.Fri, 17 Jun 2005 03:22:37 -0400Scatterplot
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=402This site gives a definition and an example of scatterplots. Topics include positive and negative association. Tue, 17 May 2005 05:26:46 -0400A Positively Skewed Distribution
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=946This assignment asks students to explore a set of data which is positively skewed. The data come from a survey of college students asking how vulnerable they feel about the loss of a parent.Fri, 13 May 2005 11:58:24 -0400Components of r
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=624As described on the page itself: "The simulation shows a scatterplot of data from a bivariate distribution in which the relationship between the two variables is linear. You can change the "input" values of slope, standard error of the estimate, or standard deviation of X for this data sample, and see the effects of your change. "Thu, 12 May 2005 04:27:32 -0400Regression by Eye
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=625In this demonstration a scatterplot is displayed and you draw in a regression line by hand. You can then compare your line to the best least squares fit. You can also try to guess the value of Pearson's correlation coefficient.Thu, 12 May 2005 04:23:07 -0400Star Library: Regression - Residuals - Why?
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=914Residual plots and other diagnostics are important to deciding whether or not linear regression is appropriate for a set of data. Many students might believe that if the correlation coefficient is strong enough, these diagnostic checks are not important. The data set included in this activity was created to lure students into a situation that looks on the surface to be appropriate for the use of linear regression but is instead based (loosely) on a quadratic function. Key words: regression, residuals Thu, 12 May 2005 02:42:54 -0400Scatterplots
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=301This applet lets you study the relationship between pairs of variables using scatterplots, the correlation coefficient, the graph of averages, linear regression, and residual plots. You can select one of four data sets using the drop-down menu, or type in the URL of a different dataset. Thu, 30 Sep 2004 10:49:55 -0400Scatter Plot (Engineering Statistics Handbook)
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=18An explanation of scatter plots, their use, purpose and interpretation. It provides examples of the various relationships described by scatter plots as well as case studies and related techniques.Tue, 27 Jul 2004 03:13:51 -0400Median-Median Line
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=147This site gives detailed instructions for calculating the median-median line. The median-median line is an alternative to the least squares regression line that is less sensitive to outliers. Tue, 20 Jul 2004 03:41:04 -0400