Normal distribution questions in trial papers use z-scores, the 68, 95, 99.7 rule and z-tables. You compare results, find percentages and counts, and work backwards to a mean or standard deviation. These questions cover each type. Tap Show a hint for one step at a time.
Sign in to take HSC practice
14 questions with instant marking. It is free, and your scores are saved to your account so you can carry on from any device.
Turn on JavaScript to sign in and take the quiz.