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14440CAUSEweb.orgen-useditor@causeweb.orgwebmaster@causeweb.orgFri, 18 Apr 2014 12:00:00 -0400Sat, 29 Jun 2013 12:00:00 -0400http://www.rssboard.org/rss-2-0-1Quote: Osler on Variability
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1768
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1768"Variability is the law of life, and as no two faces are the same, so no two bodies are alike, and no two individuals react alike and behave alike under the abnormal conditions which we know as disease." A quote by Canadian physician and medical educator Sir William Osler (1859 - 1919). The quote appears in William Osler: Aphorisms from his bedside teachings and writings, (Henry Schuman; 1950, page 104).Wed, 12 Dec 2007 12:13:47 -0500Introduction to Descriptive Statistics
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1536
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1536This tutorial introduces mean, median, mode, variance, and standard deviation using sports statistics from the Internet and class-generated statistics. Students should understand stem-and-leaf plots before using this tutorial. This material is intended for class use. Excel spreadsheets with sample data are also available for download. The relation links to a letter for teachers.Tue, 5 Sep 2006 11:36:36 -0400Descriptive Statistics
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1560
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1560This lesson on descriptive statistics highlights various measures of location and spread such as mean, median, mode, range, variance, and standard deviation. A multiple choice test is given at the end.Thu, 31 Aug 2006 02:09:33 -0400Descriptive Statistics, Measures of Central Tendency, and Dispersion
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1522
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1522This tutorial describes various measures of central tendency, their theory and use, and demonstrates them with an example on final exam scores. Data is given as well as SPSS and Minitab code. Key Words: Mean; Median; Mode; Variance; Standard Deviation.Tue, 29 Aug 2006 06:06:17 -0400Summary Statistics Calculator
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1501
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1501This applet allows users to enter two sets of data and retrieve summary statistics on each set as well as a comparison of the two sets. The calculator returns sample size, mean, standard deviation, standard error, and 95% confidence limits for the mean. Key Words: Descriptive Statistics; Confidence Interval.Wed, 23 Aug 2006 09:33:30 -0400Standard Errors
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1504
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1504This table gives the sample statistic, population parameter, population standard error, and sample standard error functions for mean, proportion, difference between means, and difference between proportions.Wed, 23 Aug 2006 09:33:30 -0400Calculus Applied to Probability and Statistics
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1171
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1171This online textbook applies calculus to probability and statistics in a business context. Chapters include 1.Continuous Random Variables and Histograms, 2. Probability Density Functions: Uniform, Exponential, Normal, and Beta, 3. Mean, Median, Variance and Standard Deviation, and 4. You're the Expert Creating a Family Trust. Each chapter also has exercises Wed, 4 Jan 2006 03:43:56 -0500Virtual Manipulative: Box Plot
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1142
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1142This is a Java Applet, which allows you to load your personal data and edit data. It provides interval and endpoint values and the option to view as a histogram.Fri, 26 Aug 2005 04:41:44 -0400Average, Standard Deviation and Relative Standard Deviation
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=447
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=447This pdf file gives definitions for average, standard deviation, and relative standard deviation, and works through a short problem as an example.Tue, 9 Aug 2005 11:27:10 -0400A Dataset that is 44% Outliers
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1083
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1083This 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.Tue, 26 Jul 2005 03:05:53 -0400Statistics at Square One: Statements of Probability and Confidence Intervals
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1045
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1045This section of an online textbook discusses, through examples, making statements about the probability of an occurence based on standard deviation. It additionally explores using confidence intervals to relate a sample to its corresponding population. Exercises are provided as well as answers.Fri, 15 Jul 2005 02:48:36 -0400Statistics at Square One: Mean and Standard Deviation
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1043
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1043This site discusses the standard deviation of grouped and ungrouped data, data transformation, and the standard deviation between and within subjects. Exercises are provided as well as the answers.Fri, 15 Jul 2005 02:26:54 -0400Numerical Summaries
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=403
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=403This site gives a definition and an example of numerical summaries. Topics include mean, median, quantiles, variance, and standard deviation.Tue, 17 May 2005 05:24:32 -0400Mean and Variance of Random Variables
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=415
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=415This site gives an explanation, a definition and an example of mean and variance of random variables. Definitions and properties are also included.Tue, 17 May 2005 04:50:49 -0400Virtual Statistician
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=446
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=446This site contains lessons which include steps, examples, and a calculator, on standard deviation, Pearson's r, t-test, one-way ANOVA, and Tukey's Post Hoc Test.Tue, 17 May 2005 12:00:51 -0400Star Library: What Makes the Standard Deviation Larger or Smaller?
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=918
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=918The activity is designed to help students develop a better intuitive understanding of what is meant by variability in statistics. Emphasis is placed on the standard deviation as a measure of variability. As they learn about the standard deviation, many students focus on the variability of bar heights in a histogram when asked to compare the variability of two distributions. For these students, variability refers to the “variation” in bar heights. Other students may focus only on the range of values, or the number of bars in a histogram, and conclude that two distributions are identical in variability even when it is clearly not the case. This activity can help students discover that the standard deviation is a measure of the density of values about the mean of a distribution and to become more aware of how clusters, gaps, and extreme values affect the standard deviation. Key words: Variability, standard deviation Thu, 12 May 2005 03:08:10 -0400Basic Sample Stats Calculator
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=261
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=261The 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.Fri, 24 Sep 2004 04:37:29 -0400Variance and standard deviation
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=260
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=260This source defines and explains variance and standard deviation.Fri, 24 Sep 2004 03:28:07 -0400Descriptive Statistics Calculator
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1592
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1592This page introduces various measures of central tendency and spread with an example on leaf size. Two descriptive statistics calculators are provided which compute mean, median, minimum, maximum, 1st & 3rd quartiles, standard deviation, and the 95% confidence interval for the mean and tests for normality. Users type in individual data points or copy and paste the entire data set. Key Words: Five Number Summary; Mode; Interquartile Range; Variance; Range; Normal Distribution. Wed, 28 Jul 2004 02:47:43 -0400Boxplot
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=17This activity allows users to create and manipulate boxplots for either built-in data or their own data. Discussion, exercise questions, and lesson plans regarding boxplots are linked to the applet. Tue, 27 Jul 2004 11:48:38 -0400Standard Deviation
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=54
http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=54This resource defines and explains standard deviation and the normal distribution.Tue, 27 Jul 2004 10:44:30 -0400