Z-Scores (Leaving Cert Mathematics): Flashcards

How many standard deviations a data point is from the mean

$z = \frac{x - \mu}{\sigma}$

The data point

The mean of the data set

The standard deviation of the data set

Data point is above the mean

Data point is below the mean

Data point is exactly at the mean

Beyond $\pm 3$

$0$

$1$

Compare scores across distributions and standardise data