In general, each web page consists of several sections (except short pages). Each section begins with a title in bold, red or blue, located in a pale green tab as you see above. When we open such a page, we see only these titles, not their contents. So we have an overview about the page. When we click a tab, the content of its section will be shown, and if we click once more, this content will be hidden. So we can show and hide the contents as our intention to get the best view of the page. You can take some trials with the titles of this page.

When the title is blue, it is linked to another web page. So, if we click the title, we will navigate to the linked page, if you click to the empty area of the pale green tab, its content will show or hide (as explanation above).

"Applied Statistics and Design of Experiments" consists of 9 chapters (Concepts, Data Descriptions, ...). Each chapter consists of several web pages. The titles of chapters are listed in the left menus of the web page. When we click the title of a chapter in menus, we will be directed to the first page of this chapter. This page contains links to other pages of this chapter. If we click to a link, the linked page is shown.

At the top and bottom of each page, there are green arrows. The left arrow direct us to the precedent page, the right arrow , the next page. When the mouse pointer is above an arrow, the title or summary of linked page appears.

To return to this page, you can click to the logo "2uData" on the top or bottom. If you click to "Course Map", you will be on a special page that contains links to all the pages of "Applied Statistics and Design of Experiments".

So, we can access to any web page in this website without difficulty.

In order to illustrate the theory and understand better, quizzes, examples and exercises are introduces. They are presented in "show-hide" form similar to the sections of a web page as we already considered above. For examples and exercises (commonly named as exercise), we are required to calculate a value then fill in an empty rectangle. Please note that in this rectangle, there is only value, its unit is not required.

After filling the result, we click on "Answer". If the answer is correct, the border of the rectangle is green and there is green "V" symbol in the adjacent square. If the answer is wrong, the border of the rectangle is red and there is red "X" symbol in the adjacent square. You can erase the answer and retry by clicking on "Retry".

For each exercise, there is a hidden solution. To show this solution, we click on "Solution" tab. But try to solve exercise by yourself, don't abuse these solutions.

Let's take a trial with this examples.

Example

What is the average of 2, 4, and 9 ?

Answer Retry

Solution

The average of these numbers is : (2 + 4 + 9) / 3 = 15 / 3 = 5

To facilitate the calculation, you can keep only 4 significant digits (12,34 instead of 12,3456789). An error about 5% is permitted. In the example above, 4,9 or 5,1 is considered as correct (you can try).

In general, quizzes are in the form of multiple choice questions. After choosing an option, an announcement of result appear. To return back to current page, we click "OK" on announcement. Of course we can choose another option.