Consider a taking a sample of 20 mussels. You know that the chance that any one mussel is a mucket is about 1 in 10, based on past experience.
The question:
You want to know the probability that from a given sample you will get four or more muckets.
This is like flipping coins - if you flip a coin 100 times you expect 50:50 heads and tails, but there is some probability of getting more than say 70 heads.
| Previous slide | Next slide | Back to first slide | View graphic version |