AS/A2 Stats 2 Stats 3

S1 Topic 3: Probability
The spinner experiment
To change the width of a sector, drag the black points (but not the white reference point) at the boundaries of the sector: TYou can also change the number of sectors by manipulating the slider bars or using the input fields to the right. After altering numbers in the input fields, click Update to change the piechart. To increase the number of sectors by 1, click on the +1 button next to the Number of sectors display; to decrease the number of sectors by 1, click on the -1 button. To simulate spinning the spinner, click on the Spin button: You can change the number of spins simulated each time you click Spin by typing the desired number in the How many spins? space. You are told which section the pointer is on (The pointer is on Blue/Magenta/etc.) and the number of times the spinner has been spun (Spins So Far:). The chart at the bottom of the program tells you the Experimental Probability, Theoretical Probability, and Count (the number of times the pointer has landed on that section) for each section. By clicking on the Show Results Frame button you can view an external window that displays the experimental results in the form of a piechart.

an applet from Project Interactive, Shodor Educational Foundation