This applet requires a Java-capable browser. The applet simulates the experiment of casting two dice, and computes the estimated probability that the sum (red + green) is 7.
To cast the die, just press the corresponding button.
Pressing the "Reset" button starts the experiment over again.
You will see later in the tutorial that the theoretical probability that x=7 is 1/6 = 0.1666... The estimated probability should approach this number as the sample size gets large. You can now verify this experimentally.
(If nothing appears below, your browser is probably not Java-capable. Sometimes, on certain platforms, parts of the picture can disappear for some reason -- to refresh, press "reload" on your browser, or just fiddle with the window size.)
When you are done, you can just close this window to return to the tutorial.