Idea 16of 22Builds onSmall experiments wander
More trials settle closer
What happens to the results when you spin many more times?
Today you'll discover
- what 100 spins give
- what 1000 spins give
- why more trials help
Think firstThe class keeps spinning the 1/4-orange spinner
The class goes on to 1000 spins in all. Where will orange's fraction land?
Decide first, then press Next. Watch how far each row's fill ends from the dashed line.
Rows of results for a 1/4-orange spinner over a scale from 0 to 1: three runs of 10 boxes at 4/10, 1/10 and 3/10, then a bar for 100 spins at 27/100 and a bar for 1000 spins at 246/1000. A dashed theory line crosses every row at 1/4, and short thick marks show each row's gap from it, shrinking down the rows. The last step shows a fair coin.
See the whole ideathe big idea and the key word, in one place
The big idea
The more trials, the closer the experimental probability gets to the theoretical probability.
Settling down
The same spinner, bigger and bigger experiments.
- 10 spins1/10 to 4/10
- 100 spins27/100
- 1000 spins246/1000
Where it goes nextThis is why the Spinner Lab lets you spin a thousand times: big experiments show the theory.
Key word
- trial
- one try in an experiment, like one spin or one flip
Ready to use it?
- Say which experiment will land closest to the theory.
- Explain why more trials help.