Collecting Data on the Internet
Before you start to collect data on the Internet, it is assumed that the students are familiar with a variety of ways of collecting data and the advantages and disadvantages of using these methods.
Method 1: Using Search Engines
Once the students have decided on their topics, they can use a search engine to find any information contained on the Internet that is pertinent to their subject. Some of the more common search engines are "Lycos", "Infoseek", "Webcrawler", "Yahoo", and "Excite", just to name a few.
After the search is completed, the student can now start collecting data from a variety of web sites or it may only take a single site to collect the data. There are no handy tips that I can give you if your students choose this method. My only advice would be to enjoy the "surfing".
Method 2: The Canadian Resource Page
This is one of the best sites that I have come across for finding Canadian information on the Internet. This site is located at http://www.cs .cmu.edu/Unofficial/Canadiana/
The following is a list of some of the topics contained at this site that may be helpful for collecting data to use in your box and whisker plots:
Canadian Dollar exchange rates
Government Services (Revenue Canada & Statistics Canada)
The Weather Network
Links to Canadian Based Publications
Facts & Figures section
Canadian Job Source
Links to Sports Leagues
Newsgroups (see below)
Many, many more!!!!
Method 3: Newsgroups
A newsgroup is similar to a bulletin board. A group of people with a common interest post messages on the website and whoever would like to read and reply to a particular message may do so. The message could also contain links to various websites that also relate to their particular topic.
In order to collect data from a newsgroup, first your students would have to find a newsgroup that relates to their topic. Teacher's Note: When you are doing a search for newsgroups, please be aware that there are many newsgroups that are not appropriate for children. Once they have found a newsgroup, they can post a message or question on the bulletin boad and hopefully they should have enough results within 24 to 48 hours that they can complete the box and whisker plots with "real-life" results. In order to get a more random sample, they may even want to post their question in a variety of newsgroups and then compare and constrast the different results and try and explain why the results came out the way they did.
Constructing Box and Whisker Plots
Some of the following information comes from an article titled, "Box-and-Whisker Plot Instructions" created by Jennifer Nord. It can be found on the Internet at, http://ellerbruch. nmu.edu/cs255/jnord/boxplot.html
The box and whisker plot is sometimes referred to as the five-number summary because a box and whisker plot displays five key numbers of any set of collected data. Those five numbers are the minimum value, the maximum value, the median, the lower quartile (the 25th percentile) and the upper quartile (the 75th percentile). If you are not familiar with percentile, if a number is at the 25th percentile that means that 25% of the data is below that number.
To construct a box and whisker plot, follow these steps:
Fifteen boys were asked how many marbles they owned. The responses were as follows: 18 27 34 52 54 59 61 68 78 82 85 87 91 93 100.
To return to the previous page use your browser's back button.