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14440CAUSEweb.orgen-useditor@causeweb.orgwebmaster@causeweb.orgMon, 21 Apr 2014 12:00:00 -0400Sat, 29 Jun 2013 12:00:00 -0400http://www.rssboard.org/rss-2-0-1The Correlation Coefficient
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1372
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1372This calculator computes the correlation coefficient (R) and p-value as well as the linear regression line for observation pairs (x,y) input by the user. The null hypothesis is that the pairs are uncorrelated.Sun, 24 Feb 2013 11:25:25 -0500Two Correlation Coefficients
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1373This calculator computes the p-value for comparing two correlation coefficients. Users input two correlation coefficients (R1,R2) and two sample sizes (N1,N2). The null hypothesis is that the correlation coefficients are equal.Sun, 24 Feb 2013 11:24:27 -0500IDEAL Modules
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1304The modules in this collection discuss numerous statistical topics with examples and Java applets. Topics covered: Variable Types; Calculations; Histograms; Moments; Quantiles; Probability Definitions, Laws, and Simulations; Binomial, Poisson, and Normal Distributions, Normal Approximation to the Binomial, Central Limit Theorem, Confidence Intervals, Hypothesis Testing, Control Charts, Contingency Tables, Correlation, and Regression.Sun, 24 Feb 2013 10:07:30 -0500Understanding the Least-Squares Regression Line
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1274
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1274This applet allows students to explore three methods for measuring "goodness of fit" of a linear model. Users can manipulate both the data and the regression line to see changes in the square error, the absolute error, and the shortest distance from the data point to the regression line.Thu, 7 Feb 2013 01:24:22 -0500**Least Squares Demo
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=2332This simulation illustrates least squares regression and how the least squares solution minimizes the sum of the squared residuals. The applet demonstrates, in a visual manner, various concepts related to least squares regression. These include residuals, sum of squares, the mean line, how the line of best fit is determined, and how the line of least squares solution minimizes the sum of the squared residuals.Mon, 2 Apr 2012 02:25:37 -0400Analysis Lab
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=50Some basic statistical analysis tools that allow the user to input their own data or use the pre-existing data and perform the desired test (e.g ANOVA, Descriptive, t-test, chi-square, correlation and regression).Wed, 30 Dec 2009 01:02:27 -0500Villanova Nursing Research Dataset Archive
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=845This page contains an index of datasets for nursing related studies. Each dataset is accompanied by a worksheet asking students to analyze certain aspects of the data; a description of the study; and a description of each of the variables used.Wed, 30 Dec 2009 12:58:01 -0500Quote: Sener on Extrapolation
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=2002Tue, 29 Dec 2009 06:21:42 -0500Poem: A Statistician from Needham
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1776This limerick was written by Columbia University professor of biostatistics, Joseph L. Fleiss (1938 -2003). It was published along with three other limericks by Dr. Fleiss in a letter to the editor of The American Statistician (volume 2; 1967, page 49). It was written while he worked as a biostatistician at the Department of Mental Hygiene of the State of New York just prior to receiving his Ph.D. and joining the faculty at Columbia.Fri, 21 Dec 2007 09:29:24 -0500*Using an Applet to Demonstrate Sampling Distributions of Regression Coefficients
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1760This visualization activity combines student data collection with the use of an applet to enhance the understanding of the distributions of slope and intercept in simple linear regression models. The applet simulates a linear regression plot and the corresponding intercept and slope histograms. The program allows the user to change settings such as slope, standard deviation, sample size, and more. Students will then see theoretical distributions of the slope and intercept and how they compare to the histograms generated by the simulated linear regression lines.Sun, 25 Nov 2007 07:12:35 -0500**Regression
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1747Regression contains three applets on linear, quadratic and exponential regression. Each allows the user to investigate the relationship between the scatter plot of entered data and the regression equation.Tue, 29 May 2007 11:09:16 -0400Cartoon: Regression Assumptions
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1684A cartoon to teach about the distributional assumptions in linear models. Cartoon by John Landers (www.landers.co.uk) based on an idea from Dennis Pearl (The Ohio State University). Free to use in the classroom and on course web sites.Wed, 13 Dec 2006 06:17:51 -0500Song: Heteroscedasticity
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1220Playful song has recurrent mention of the term heteroscedasticity.Thu, 7 Dec 2006 04:52:34 -0500Introduction to Radial Basis Function Networks
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1535This article introduces Radial Basis Function (RBF) networks. These networks rely heavily on regression analysis techniques. Topics include Nonparametric Regression, Classification and Time Series Prediction, Linear Models, Least Squares, Model Selection Criteria, Ridge Regression, and Forward Selection. Tue, 5 Sep 2006 10:50:48 -0400Pearson's Product-Moment Coefficient of Correlation
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1516This tutorial explains the theory and use of Pearson's Product Moment Coefficient of Correlation and demonstrates it with an example on GPA and test scores. Data is given as well as SPSS and Minitab code.Tue, 29 Aug 2006 06:06:17 -0400Regression, Prediction, and Model Building
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1519This tutorial explains the theory and use of Multiple Regression and demonstrates it with an example on SAT scores and GPA. Data is given as well as SPSS and Minitab code.Tue, 29 Aug 2006 06:06:17 -0400Introduction to Quantitative Methods
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1482This course webpage contains 7 lessons for introductory statistics. Each lesson introduces a new statistical topic, provides datasets for exploring concepts, links to instructions for using statistical software, links to online statistical calculators, and provides homework assignments. Topics include: Introduction to Statistical Methods; Graphing & Tabulating Data; Describing Central Tendency, Variability & Skew; Normal Distribution & Standard Scores; Correlation & Regression; Proportions & Contingencies; Sampling & Statistical Inference.Mon, 14 Aug 2006 10:03:29 -0400Time Series Data Library
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1468
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1468This collection of datasets covers many application areas, but are all for time series analysis. The data are in text format.Fri, 4 Aug 2006 10:56:40 -0400Interactive Polynomial Model Fitting Applet
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1464This applet allows users to draw a curve on a graph, and then displays the polynomial fit of the curve.Fri, 4 Aug 2006 09:25:57 -0400Free Software
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1395
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1395This collection of macros for Microsoft Excel addresses numerous topics like decision trees, the Central Limit Theorem, queueing, critical path analysis, regression with prediction intervals, and recognizing departures from normality.Thu, 13 Jul 2006 03:24:38 -0400Multiple Linear Regressions Analysis
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1393This online calculator allows users to enter 16 observations with up to 4 dependent variables and calculates the regression equation, the fitted values, R-Squared, the F-Statistic, mean, variance, first order serial-correlation, second order serial-correlation, the Durbin-Watson statistic, and the mean absolute errors. It also tests normality and gives the i-th residuals.Thu, 13 Jul 2006 02:15:35 -0400Linear Regression and Best Fit
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1392
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1392This lesson introduces simple linear regression with several Excel spreadsheet examples such as temperature versus cricket chirps, height versus shoe size, and laziness versus amount of TV watched. These activities require class participation.Thu, 13 Jul 2006 01:44:51 -0400Introduction to Simple Linear Regression
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1391This page explains simple linear regression with an example on muscle strength versus lean body mass.Thu, 13 Jul 2006 01:32:37 -0400Regression Applet
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1258This applet was designed to illustrate the impact on simple linear regression output caused by adding a new data point. The applet simulates data and provides a graphical display of the data points and fitted regression line as well as the updated regression line after the addition of a data point.Tue, 30 May 2006 03:46:49 -0400Deriving Regression Lines Without Calculus
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1119
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1119This article describes a method to calculate the least squares line algebraically. First, the author uses a numeric example, which uses calculus, then describes a simpler algebraic method.Mon, 22 Aug 2005 04:01:44 -0400