Making Predictions

A prediction is a guess about something in the future

One way to make a prediction is to collect information by conducting a survey

Predictions are made on the basis of experimental data (historical probability figures)

A prediction or expectation is a guess about something in the future

One way to make a prediction is to use probability in the form of proportions

The ratio of the number of desired outcomes (x) to the number of attempts (n) is x/n

x/n will always be equal to the theoretical probability of the event (for one attempt).
For example, let the number of times we get heads in 6 throws be x.
x/6 = 1/2 [ P(heads per throw) ]