What you will learn:

9A Normally distributed data
9B The 68–95–99.7 rule
9C z-scores
9D Converting z-scores into actual scores
9E Using z-scores to compare data
9F Further applications of normal distributions

Outcomes:

• Recognise data that is normally distributed.
• Understand that the mean and the median are approximately equal for normally distributed data.
• Calculate the z-score using the formula.
• Describe the z-score in terms of standard deviations.
• Use z-scores to compare scores from different datasets.
• Use collected data from a normal distribution to make judgments.
• Use z-scores to identify probabilities of a given event.