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This issue contains articles about binomial confidence intervals; the team effect in stock car racing; using multiple tests (one-sample t-test and sign test); the "two-envelope exchange paradox" (similar to the Monty Hall problem) with discussions of expectation, likelihood, and inference; regression line vs. trend line; calculations of standard normal table values and pi; teaching at a small liberal arts college; modeling extreme events.
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Date Of Record Creation 2010-09-01 14:17:00
Date Last Modified 2010-09-01 14:19:00
Date Of Record Release 2010-09-01 14:19:00
Alternate Title June 8, 2010 T&L Webinar
Source Concetta DePaolo
Email Address
Date Issued 2010-05-20
Resource Type
Typical Learning Time Pompeu Fabra University
Author Name American Statistical Association
Author Organization Lake Tahoe Community/Technical College
General Comments Viewers can also download the PowerPoint slides
Supplemental (Lesson Plans)
Technical Requirements Internet browser, flash plug-in, sound card for video
Comments This resource provides an odd combination of (1) a very simple treatment of probability and (2) an introduction to Type I and Type II errors. Separately, either of these could be worth studying in the format presented here. As a pair, they don't fit together very well; nor is either of them presented particularly well here. Ultimately, the student gets a tiny bit each of two not-so-simple concepts rather than a deeper exploration of one of the two. The Assessment module asks three trivial questions about probability and one about Type I error.
Content Quality (Concerns) The number of decimal places required is a little inconsistent. For example, the one-sided critical z-value for alpha=.05 is to be entered as 1.645, but the value for alpha=.01 is to be entered as 2.33. A good thing is that the author does make note of this and the applet is set up to accept both 1.645 and 1.65. Also, several times as I was reviewing the module, it froze and I had to refresh the page in the middle of a problem. This could prove frustrating to students. It could be a unique problem related to the computer being used, however.
Content Quality (Strengths) This module allows students to repeatedly practice a necessary skill. It allows for multiple attempts, provides feedback and hints, and includes an instructional video. There are several examples that go step by step and give hints.
Ease of Use (Concerns) I'm concerned about the applet freezing up, which happened 3 times as I was reviewing it.
Ease of Use (Strengths) There are hints available and a movie tutorial. The module is highly interactive and engaging.
Potential Effectiveness (Concerns) I do not feel as though all topics a student should know were covered in this tutorial, namely appropriate use of z and t tables, and introduction to p-values. To be fair, however, it does not appear that the author intends for this applet to be a stand-alone lesson given the disclaimer at the beginning of the tool. This resource seems like it could be more of a rote practice tool than a conceptual discovery tool.
Potential Effectiveness (Strengths) There were many examples that allowed the student to get plenty of practice. This module provides practice in a simple and consistent way. One of the complaints I see from students is that each problem seems so different and they don't know when to do what. I think practice with this module would help with that. It would be easy to provide this material as an online resource to students. The material keeps track of the questions students get correct, and this is a nice touch.
Source Code Available 1
Material Type
Statistical Topic
Application Area
Cost involved with use
Intended User Role
Math Level

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