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14440CAUSEweb.orgen-useditor@causeweb.orgwebmaster@causeweb.orgTue, 30 Sep 2014 12:00:00 -0400Tue, 20 May 2014 12:00:00 -0400http://www.rssboard.org/rss-2-0-1Quote: Oakes on Confidence Intervals versus Tests
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=2351"The researcher armed with a confidence interval, but deprived of the false respectability of statistical significance, must work harder to convince himself and others of the importance of his findings. This can only be good." is a quote by British statistician Michael W. Oakes. The quote is found in his 1986 book "Statistical Inference: a Commentary for the Social and Behavioural Sciences" published by John Wiley & Sons.Wed, 5 Jun 2013 10:58:54 -0400Confidence Interval Creation Applet
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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
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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 -0400Cartoon: Elevator in the Stat Building
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=2264A cartoon to use when talking about confidence intervals. 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.Thu, 20 Jan 2011 03:30:42 -0500**Confidence Interval Tutorial
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=2040This tutorial introduces students to the basics of confidence intervals in a Q & A format with options for entering answers to questions and having those answers checked.Fri, 16 Apr 2010 09:05:12 -0400Cartoon: The Aircraft Carrier
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1845A cartoon to teach about confidence intervals. 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.Tue, 18 Nov 2008 07:59:13 -0500Cartoon: The Pollsters
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1801A cartoon to teach about the interpretation of confidence statements. The cartoon plays on the idea of what would happen if the same process was repeated over-and-over again. 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.Fri, 28 Mar 2008 04:14:54 -0400Cartoon: Professor's Directions
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1675A cartoon for teaching that confidence intervals do not always contain the true parameter. 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 02:46:38 -0500Cartoon: Confidence
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1674A cartoon to teach about the interpretation of confidence in inference. 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 02:44:03 -0500Cartoon: Statistical Movies
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1673A cartoon to teach about the importance of providing measures of error, like the Margin-of-Error, with estimates. 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 02:40:49 -0500Cartoon: Butter Usage Results
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1655A cartoon to teach about the Margin of error in sample surveys. 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.Tue, 12 Dec 2006 05:49:24 -0500New Confidence Interval Applet
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=32This simulation applet shows groups of confidence intervals for a given alpha based on a standard normal distribution. It shows how changes in alpha affect the proportion of confidence intervals that contain the mean. An article and an alternative source for this applet can be found at http://www.amstat.org/publications/jse/v6n3/applets/confidenceinterval.html.Tue, 26 Sep 2006 12:36:35 -0400Confidence Interval Simulation
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1155This Java applet demonstrates confidence intervals for the mean. It allows the user to alter sample size, samples taken, intervals, and the option of standard error. The applet displays sample values, such as average, standard deviation, and percent covered.Wed, 14 Sep 2005 04:43:44 -04001993 New Car Data
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=1057This dataset describes 93 new cars for the 1993 model year with 26 variables, including price, mpg ratings, and engine size; it also illustrates a broad range of statistical techniques such as box-whisker plot, confidence intervals, difference in means, one-way ANOVA, contingency table, scatterplot, regression, and correlation. Tue, 26 Jul 2005 11:55:07 -0400Statistics at Square One: Statements of Probability and Confidence Intervals
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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 -0400Confidence Intervals
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=420This site gives an explanation of, a definition for and an example of confidence intervals. It covers topics including inference about population mean and z and t critical values.Tue, 17 May 2005 05:23:32 -0400Sampling SIM: Confidence Intervals
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=575This webpage provides instructions for teaching confidence intervals using Sampling SIM software. It includes information regarding prerequisite knowledge, common misconceptions, and objectives, as well as links to an activity and a pre/post-test.Fri, 13 May 2005 03:13:01 -0400RVLS Case Studies
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=248This site provides case studies which cover subject areas including: analysis of variance, boxplots, confidence intervals, contrast among means, correlated t-test, correlation, histograms, independent groups t-test, regression, repeated measures ANOVA, and t-tests. Thu, 12 May 2005 04:12:39 -0400Star Library: What is the Shelf Life?
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=920The Food and Drug Administration requires pharmaceutical companies to establish a shelf life for all new drug products through a stability analysis. This is done to ensure the quality of the drug taken by an individual is within established levels. The purpose of this out-of-class project or in-class example is to determine the shelf life of a new drug. This is done through using simple linear regression models and correctly interpreting confidence and prediction intervals. An Excel spreadsheet and SAS program are given to help perform the analysis. Key words: prediction interval, confidence interval, stability Thu, 12 May 2005 03:13:46 -0400Against All Odds: 19. Confidence Intervals
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=617This free online video program "lays out the parts of the confidence interval and gives an example of how it is used to measure the accuracy of long-term mean blood pressure. An example from politics and population surveys shows how margin of error and confidence levels are interpreted. The program also explains the use of a formula to convert the z* values into values on the sampling distribution curve. Finally, the concepts are applied to an issue of animal ethics." This individual video is accessed by scrolling down to the "Individual Program Descriptions - 19. Confidence Intervals" and click the "VOD" icon at the top-right of the description.Thu, 12 May 2005 12:35:28 -0400Star Library: Rectangularity
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=893This article describes an interactive activity illustrating sampling distributions for means, properties of confidence intervals, properties of hypothesis testing, confidence intervals for means, and hypothesis tests for means. Students generate and analyze data and through simulation explore these concepts. The activity is completed in three parts. The three parts of the activity can be used in sequence or they can be used individually as “stand alone” activities. This allows the educator flexibility in utilizing the activity. Part I illustrates the sampling distribution of the sample mean. Part II illustrates confidence intervals for the population mean. Part III illustrates hypothesis tests for the population mean. This activity is appropriate for use in an introductory college or high school AP statistics course. Key words: sampling distribution of a sample mean, confidence interval for a mean, hypothesis test on a mean, simulation, random rectangles Thu, 12 May 2005 12:35:15 -0400Who is Buying iMacs?
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=642This case study covers the following concepts: confidence intervals for proportions and the normal approximation to the binomial. It also assesses the question: "What proportion of the iMac purchasers are new computer owners?"Wed, 11 May 2005 09:14:08 -0400** Confidence Interval for a Mean
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=364This Java based applet gives students an opportunity to work through confidence interval problems for the mean. The material provides written word problems in which an individual must be able to correctly identify the given parts for a confidence interval calculation, and then be able to use this information to find the confidence interval. It gives step by step prompts to encourage students to choose the correct numbers and "cast of characters".Mon, 29 Nov 2004 04:27:33 -0500Confidence Intervals
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=198This resource assists the user in reading, constructing, and understanding confidence intervals.Sat, 24 Jul 2004 11:20:00 -0400HyperStat Online: Ch. 8, Confidence Intervals
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http://www.causeweb.org/cwis/index.php?P=FullRecord&ResourceId=197This resource gives a thorough definition of confidence intervals. It shows the user how to compute a confidence interval and how to interpret them. It goes into detail on how to construct a confidence interval for the difference between means, correlations, and proportions. It also gives a detailed explanation of Pearson's correlation. It also includes exercises for the user.Sat, 24 Jul 2004 11:12:31 -0400