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14440CAUSEweb.orgen-useditor@causeweb.orgwebmaster@causeweb.orgWed, 17 Sep 2014 12:00:00 -0400Tue, 20 May 2014 12:00:00 -0400http://www.rssboard.org/rss-2-0-1IDEAL: Two-Sample Hypothesis Testing
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1312
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1312This example compares balance measurements in elderly people with those of young men through two-sample hypothesis testing for means. Two applets are provided; one for testing the assumptions beneath two-sample hypothesis tests, and one for calculating the test statistic and p-value.Sun, 24 Feb 2013 10:52:30 -0500IDEAL: Hypothesis Testing for Paired Differences in Means
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1313
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1313This page provides three examples designed to illustrate hypothesis testing for paired differences in means. Example #2 requires Lisp-Stat. The other two examples each contain applets that calculate the test statistic and p-value. Examples #1 and #3 are about city murder rates and types of corn seed, respectively.Sun, 24 Feb 2013 10:49:49 -0500IDEAL: Contingency Tables
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1314
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1314This module demonstrates how to perform two chi-square tests, the chi-square test of independence and the chi-square test of homogeneity, through the use of contingency tables. The applets provided ask users to fill in expected cell frequencies in the table.Sun, 24 Feb 2013 10:47:03 -0500IDEAL: The Normal Distribution
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1320
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1320This module discusses the history and importance of the normal distribution, as well as normal moments, the standard normal distribution, normal probabilities, Z-Scores, and normal quantiles. The applet allows users to compute normal probabilities and quantiles. Three follow-up examples cover cholesterol, male heights, and mean temperatures for various cities in South Carolina.Sun, 24 Feb 2013 10:46:14 -0500IDEAL: Probability Definitions
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1305
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1305This module discusses the probability of an event and relative frequency. The applet shows how empirical probability converges to theoretical probability as the sample size increases. The follow-up example includes an applet that simulates drawing differently colored balls from an urn.Sun, 24 Feb 2013 10:19:29 -0500IDEAL: Hypothesis Testing
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1311
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1311This module introduces hypothesis testing with an example on breast cancer rates of Peurto Rican women. The applet provided allows users to manipulate power type, sigma, alpha, delta, and sample size. The Example link at the bottom of the page provides a more detailed discussion of power and instructions for the applet.Sun, 24 Feb 2013 10:18:17 -0500IDEAL: The Poisson Distribution
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1307
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1307This module discusses the conditions of a Poisson experiment and the Poisson distribution. The applet allows the user to compute probabilities from the Poisson distribution. A follow-up example covers horse-kick deaths of Prussian military personnel.Sun, 24 Feb 2013 10:17:03 -0500IDEAL: Confidence Intervals for Paired Differences
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1310
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1310This page provides two examples that illustrate confidence intervals for paired differences in means. Each exercise provides an applet which graphs the data and calculates the interval. The first example is about city murder rates, and the second is about preparation of tobacco leaves.Sun, 24 Feb 2013 10:15:43 -0500IDEAL: The Binomial Distribution
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1306
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1306This module discusses the conditions of a binomial experiment and the binomial distribution. The applet allows the user to compute probabilities from the binomial distribution. Two follow-up examples cover students guessing on a multiple-choice test and the number of delinquents and non-delinquents who wear glasses.Sun, 24 Feb 2013 10:14:36 -0500IDEAL: Confidence Intervals
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1309
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1309This module contains an applet which illustrates factors affecting the width of confidence intervals for means. Users can manipulate the values of the population mean, population standard deviation, the sample size, and the level of confidence. Two follow-up examples, Cholesterol and Speed Of Light, further illustrate this concept.Sun, 24 Feb 2013 10:13:20 -0500IDEAL: The Normal Approximation to the Binomial
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1308
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1308This module contains an applet which can be used to experiment with computing approximate and exact binomial probabilities and to assess the conditions for which the normal approximation to the binomial distribution is good.Sun, 24 Feb 2013 10:11:48 -0500IDEAL Modules
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1304
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 -0500Bootstrapping Applet
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=2338
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=2338The WISE Bootstrapping Applet can be used to demonstrate bootstrapping by creating a confidence interval for a population mean or median. The user can manipulate the population distribution, sample size, and number of resamples. An associated guide gives suggestions for teaching bootstrapping.Sun, 3 Feb 2013 09:56:23 -0500Confidence Interval Game
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=2339
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=2339This applet is meant to test a student's ability to estimate p values from confidence intervals.Sun, 3 Feb 2013 09:55:54 -0500DataCounts!
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=2337
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=2337DataCounts! is an interactive website designed to help integrate social statistics into the classroom setting. Each collection contains a wide variety of datasets that can be viewed online with WebCHIP. DataCounts! also houses a collection of teaching modules that have been created by teachers across the country to integrate social science data into their classes.Fri, 25 Jan 2013 05:40:08 -0500StatKey
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=2334
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=2334StatKey is the analysis package to accompany the textbook "Statistics: Unlocking the Power of Data." StatKey includes interactive applets to describe and graph data, engage in bootstrapping and randomization tests, and explore sampling distributions and theoretical distributions.Sat, 4 Aug 2012 06:09:13 -0400**Least Squares Demo
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=2332
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 -0400**Practice Classifying Statistical Problems
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=2331
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=2331On this site, students can practice classifying statistics problems. They first click to check the statistical methods that they want to practice classifying. Then they click the "Submit" button to get a description of a research project that involves a statistical technique. Students then click on the technique that will most likely be used in the project. If they choose the incorrect answer, they must read the hint and try again. When they get something correct, they click on the "Next" button to try another problem.Sun, 1 Apr 2012 10:44:27 -0400**Java Demos for Probability and Statistics
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=2329
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=2329The applet demonstrates, in a visual manner, the following probability and statistical concepts (and there is also a random number generator): Introduction to Probability Models (Using dice rolls), Hypergeometric Distribution, Poisson Distribution, Normal Distribution, Hypothesis Testing for Proportions, Confidence Intervals for Means, The Central Limit Theorem, Bivariate Normal Distribution, and Linear Regression.Sun, 1 Apr 2012 10:21:14 -0400Confidence Interval Creation Applet
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=2328
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=2328The interactive Confidence Interval Creation Applet allows instructors to demonstrate how sample size, alpha level, population shape, and variance affect confidence intervals.Sun, 1 Apr 2012 10:13:35 -0400Confidence Interval Overlap Applet
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=2327
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=2327Researchers and students alike often mistake any overlap among 95% confidence intervals to denote a statistically non-significant p value. However, confidence intervals can overlap and still correspond to a statistically significant p value for an independent sample t test. The confidence interval (CI) applet will help learners understand the relationship between confidence interval overlap and statistical significance.Sun, 1 Apr 2012 10:08:50 -0400Statistics Applets
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=2326
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=2326This is an extensive collection (and a continuously expanding collection) of applets on topics that include probability, descriptive statistics, sampling distributions, Monte Carlo simulation, Buffon's coin problem, chi-square, p-values, correlation, and more. There is even a random number generator that is part of the collection.Wed, 21 Mar 2012 01:17:16 -0400**Probability Histograms
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=2324
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=2324This simulation allows you to roll two dice and compare empirical and probability histograms for the sum or product of the two outcomes.Mon, 16 May 2011 01:40:27 -0400**Power Tutorial
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=2280
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=2280This tutorial is intended to teach students how power in a one-sample Z-test is influenced by effect size, variability (population standard deviation), sample size, and significance level. WISE Power Tutorial can be used in a variety of settings including as a tutorial for an individual student, during a lab, and after a lecture. The applet embedded in the tutorial could be used during an in-class demonstration.Sun, 30 Jan 2011 01:36:32 -0500