Probability is about estimating or calculating how likely or probable something is to happen. Probabilities can be described in words. For example, the chance of an event happening could be ...

Determine whether the difference between the sample means is statistically significant. Use .05 as your probability level. Be careful here. Draw a normal curve and label it appropriately and shade the ...

The investigate weather forecasts experiment looks at how to work out the probability of the weather forecast being right. Level 1 - Pack of cards Questions to test your ability to work out the ...