You need to have JavaScript enabled in order to access this site.

Measures of Dispersion

Page Name:

Drag to rearrange sections

Rich Text Content

The measure of dispersion is very important to special educators because they must determine the degree or amount of differences exhibited by individuals in behaviors, skills, or traits, the differentiated method must be employed in calculating differences from the average or expected score.

This uses standard deviation, range, variance, statistical dispersion to expand or squeeze scores to find the typical score of what is being measured.

uploaded image

Standard Deviation

In normal distribution,Standard deviations represent percentages of scores shown on the bell curve.

uploaded image

Note : to clarify the significance of standard deviation, it is helpful to remember that one criterion for the diagnosis of mental retardation is an IQ score of more than two standard deviation below the mean as shown above.

Skewed Distribution

Distribution can be skewed in a positive or negative direction. When many of the scores are below the mean, the distribution is said to be positively skewed. When a large number of the scores occur above the mean, the distribution is said to be negatively skewed.

uploaded image

uploaded image

Allow Comments on this Page

Make Comments Public

Drag to rearrange sections

Rich Text Content

Close

Using an ePortfolio

Introduction
ePortfolios are a place to demonstrate your work. They are made of sections and pages. The list of sections are along the left side of the window (show me). Each section can have multiple pages, shown on the right side of the window (show me).
Portfolio Sections

Sections are listed along the left side of the window (show me). Each section can have multiple pages inside of it. To organize or add sections, click the "Organize Sections" link (show me).

You can rename any section by clicking on the icon that appears, rearrange sections by clicking and dragging them, or delete sections by clicking the icon.
Section Pages

Sections have multiple pages. You can see the list of pages for the current section on the right side of the window (show me). To organize or add pages, click the "Organize/Manage Pages" link (show me).

You can rename any page by click on the icon that appears, delete a page by clicking the × icon, or rearrange the order of pages by click and dragging them.
Page Content
The content you see on a page is the same content any visitors will see. To edit this content, click the " Edit This Page" link (show me) and the page will change to editing mode.
Page Content

Now you're editing! Rename the page or change commenting options (show me) if you like. You can save, preview or cancel your changes at any time by clicking the button on the right side (show me).

Content is divided into subsections, which each have a dotted border. You can delete or edit the contents of a subsection by clicking the or icons at the top right corner of the subsection.

To add new subsections, find and click the type of content you want to add in the options list on the right side of the page (show me).
ePortfolio Settings
To change the settings for your ePortfolio, click the "ePortfolio Settings" link (show me). You can rename the portfolio and also change whether it is public or private. Private portfolios are only visible to those to whom you grant access.