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14440CAUSEweb.orgen-useditor@causeweb.orgwebmaster@causeweb.orgSat, 20 Sep 2014 12:00:00 -0400Tue, 20 May 2014 12:00:00 -0400http://www.rssboard.org/rss-2-0-1McNemar's Test
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1363
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1363This calculator computes the p-value for McNemar's Test, which determines if the pair AB is as likely as the pair BA. The user inputs values in a 2x2 table, where the pairs AA and BB are ignored. The null hypothesis is that the pairs are equally likely.Sun, 24 Feb 2013 11:33:36 -0500The Wilcoxon Matched-Pairs Signed-Ranks Test
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1364
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1364This calculator computes the p-value for the Wilcoxon Matched-Pairs Signed-Ranks Test, which determines if the members of a pair differ in size. The user inputs either the pairs or the differences in the pairs. The null hypothesis is that the median difference of the pairs is zero.Sun, 24 Feb 2013 11:33:08 -0500The Sign Test
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1362This calculator computes the p-value for the Sign Test. The user inputs the number of observations above the median (n+) and below the median (n-). The null hypothesis is that values above and below the median are equally likely.Sun, 24 Feb 2013 11:33:02 -0500The Chi-Square Distribution
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1361
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1361This calculator computes probabilities from the Chi-square distribution. Enter the Chi-square statistic (X^2) and the degress of freedom, and the calculator returns the right tail probability at the top of the page.Sun, 24 Feb 2013 11:32:36 -0500The Binomial Distribution
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1358
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1358This calculator computes probabilities from the binomial distribution. The user inputs the number of successes (x), the probability of success (p), and the sample size (N). P(X>=x) is returned at the top of the page.Sun, 24 Feb 2013 11:32:04 -0500The Normal Distribution
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1359This calculator computes probabilities from the standard normal distribution. The user inputs the z-score (Z), and P(|Z|>=z) is returned at the top of the page.Sun, 24 Feb 2013 11:31:46 -0500The Wilcoxon Two Sample Test
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1368
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1368This calculator computes the p-value for the Wilcoxon Test. The user inputs values for two samples. The null hypothesis is that the populations from which the two samples are taken have identical median values.Sun, 24 Feb 2013 11:26:14 -0500The Rank Correlation Coefficient
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1371This calculator computes the rank correlation coefficient (R) and p-value for the Rank Correlation Test. The user inputs observation pairs (x,y). The null hypothesis is that their is no monotonic relation between the variables (i.e., any increase in one variable is NOT associated with either an increase or a decrease in the other variable).Sun, 24 Feb 2013 11:25:46 -0500The 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 -0500Chi-Square Test for Equality of Distributions
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1375
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1375This calculator computes the chi-square statistic, degrees of freedom (DoF), and p-value for the Chi-square test for equality of distributions. Users input a table of values with row and column labels without total scores. The null hypothesis is that the all the samples have the same distribution.Sun, 24 Feb 2013 11:25:01 -0500Two Correlation Coefficients
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1373
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 -0500Binomial Proportions
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1367This calculator computes the probability that two proportions are equal, given sample proportions. The user inputs values for x1, n1, x2, and n2. The null hypothesis is that the two proportions are equal.Sun, 24 Feb 2013 11:24:00 -0500The Student T Test for One Sample
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1365This calculator computes the t-statistic, degrees of freedom (DF), and p-value for the Student's t Test for pairwise differences. The user inputs either the pairs or the differences in the pairs. The null hypothesis is that the mean difference of the pairs is zero.Sun, 24 Feb 2013 11:22:22 -0500The Student T Distribution
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1360This calculator computes probabilities from the student t distribution. The user inputs t and the degress of freedom, and P(|T|>=t) is returned at the top of the page.Sun, 24 Feb 2013 11:21:57 -0500The Student-t Test for Two Samples
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1369
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1369This calculator computes summary statistics, the t-statistic, degrees of freedom (DF), and p-value for the Student t-Test. The user inputs values for two samples. The null hypothesis is that the populations have identical mean values.Sun, 24 Feb 2013 11:16:43 -0500Friedman Test
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1370
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1370This calculator computes Kendall's coefficient of concordance (W), Q (approximated by chi-square), degrees of freedom (DoF), and p-value for the Friedman Test. The user inputs a table of values with row and column titles, without total scores. Beginning a line with # excludes the line from the computation. The null hypothesis is that the distributions of ranks within rows are unrelated between rows.Sun, 24 Feb 2013 11:14:42 -0500Chi-Square Test for Known Distributions
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1374
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1374This test checks whether an observed distribution differs from an expected distribution. It computes the chi-square statistic, degrees of freedom (DoF), and p-value. Users input a table with row and column labels, observed frequencies on the first row, and expected frequencies on the second row. The null hypothesis is that the observed values have the expected frequency distribution.Sun, 24 Feb 2013 11:09:59 -0500Quick Start Guide for Common Calculators
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1094Table of instructions for TI, Casio, HP, Sharp, and some common other brands of calculators. Instructions are given for how to enter data (both one and two variable), how to compute mean, standard deviation (both population and sample), correlation, linear regression coefficients, combinations, permutations, and (importantly) how to turn the calculator on and off.Sun, 24 Feb 2013 10:30:11 -0500SurfStat Australia
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1174
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1174This website serves as an online textbook for introductory statistics, covering topics such as summarizing and presenting data, producing data, variation and probability, statistical inference, and control charts.Thu, 7 Feb 2013 01:20:38 -0500Bootstrapping Applet
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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!
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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 -0500DISCUSS: Critical Path Analysis
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1384This module introduces critical path analysis and addresses the following topics: Networks; Critical paths; Floats; Activity-on-node (AON) networks. Excel spreadsheets are used to provide examples and exercises.Thu, 24 Jan 2013 06:52:39 -0500A Practical Study of the Capture/Recapture Method of Estimating Population Size
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1109
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1109This article describes the process the of capturing and recapturing of mobile animals in order to estimate population size.Mon, 21 Jan 2013 06:37:06 -0500**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