AP Statistics · Unit 3 · Probability
Probability Lab
Run a chance process repeatedly. Compare the probability predicted by a model with the long-run relative frequency you actually observe. The display updates as trials accumulate.
Set up the chance process
Each run adds this many new trials.
Predict the result before clicking. Run again to see how the relative frequency changes. Random results vary from run to run.
DiscussHow close do you expect the observed proportion to be after 10 trials? After 1,000? Does a long run guarantee an exact match?
Heads in repeated coin flips
Trials so far0
Observed proportion—
Theoretical probability0.500
Observed proportionTheoretical probability
Press Run trials to begin. The green bar marks the probability predicted by the model.