Year+10+Statistics

The object of this topic is to compare two sets of data and make conclusions about the difference between them by comparing the

 * ==== shapes of distributions, ====
 * ==== the middle 50% of the distributions (the box in the box and whisker graph), ====
 * ==== the spread of the distributions ====
 * ==== anything else relevant to the particular situation. ====

You must discuss features of the graphs and use statistics, for example: in your investigation.
 * mean,
 * median,
 * mode,
 * lower and upper quartiles,
 * range,
 * inter-quartile range

Here are of comments that you can alter as well as a few box and whisker plots to make comments about.

You must know how to work out the 5 points for a box and whisker graph (median, LQ, UQ, min and max).

Here is an for practising drawing box and whisker graphs.

There is a great little interactive site for box and whisker graphs. You can compare graphs as well as enter your own data. There are clues for writing your comments comparing two sets of data.

On another interactive site you can change some of the data values and see how it affects the box-and-whisker plot. Here's another cool site where you drag the data values in one at a time and can see the way a box-and-whisker plot changes.