Normal distribution

Z=\frac{x-\mu}\sigma

Number of standard deviations from the mean

flashcards

Question	Answer
What does Z represent in the formula Z = \frac{x - \mu}{\sigma}?	The number of standard deviations a data point x is from the mean \mu.
What percentage of data falls within one standard deviation of the mean in a normal distribution?	68.2% of the data lies within \mu \pm \sigma, meaning Z = \pm 1.