Z-Scores
This week's episode dicusses z-scores, also known as standard score. This score describes the distance (in standard deviations)
that an observation is away from the mean of the population. A closely related top is the
68-95-99.7 rule which tells us that (approximately) 68% of a normally
distributed population lies within one standard deviation of the mean, 95 within 2, and 99.7 withi