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**The t-test Tutorial: Comparing Cultures

This tutorial takes the learner step-by-step in applying descriptive and inferential statistics using a real world situation.
Cumulative Rating: (not yet rated)
Date Of Record Creation 2004-03-10 13:36:00
Date Last Modified 2012-04-02 14:42:00
Date Of Record Release 2004-07-27 10:45:00
Email Address dale.berger@cgu.edu
Resource Type
Audience
Format
Author Name Dale Berger
Author Organization Claremont Graduate University, Claremont, CA
Comments I thought the discussion about a one or two-tailed test could be improved. The bell-shaped curve was not explained and the labels on the x-axis were confusing. The explanation on why other analyzes, like a correlation analysis, were weak.
Content Quality (Concerns) There are some dead-ends; that is, in some parts of the module, the user must use the back button several times to get back to the beginning. Some of the discussion on the web pages could be improved.
Content Quality (Strengths) Goals are stated within different parts of the module. There is an "Ask the expert" link, which will lead the student through a series of scaffolding questions to (hopefully) arrive at the correct answer. Follow-up questions are provided at the conclusion of the lesson that encourages students to interpret what they just learned.
Ease of Use (Concerns) Students might get confused by clicking on a wrong link. It could be improved by a table of contents at top that gives links to all pages.
Ease of Use (Strengths) It was easy to navigate through the web pages and respond to the questions posed.
Potential Effectiveness (Concerns) Should be updated to include p-value method for determining significance. Degrees of freedom explanation does not necessarily match that in some major textbooks. User may get frustrated with dead links and dead-end paths. Should link to one of their own applets to let user put in mean, sd to calculate the mean. (http://wise.cgu.edu/hypothesis/hypothesis_applet.asp)
Potential Effectiveness (Strengths) Has effective explanations of correct answers as well as good explanations when user selects the incorrect path. Exposure to mini case studies like this are helpful, since they communicate the entire process of a statistical investigation.
Content Quality (Rating) 3
Ease of Use (Rating) 4
Potential Effectiveness (Rating) 3
Source Code Available 1
Material Type
Statistical Topic
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Cost involved with use
Intended User Role
Math Level

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