Investopedia / Tara Anand Z-score is a statistical measurement that describes a value's relationship to the mean of a group of values. Z-score is measured in terms of standard deviations from the ...

Z-score is a standard measurement used in statistical analysis that looks at data with a normal distribution. It provides a standard unit of measurement for placing your data on a common scale.

If you enter an out-of-range age, your entry will not be accepted and the calculated values will not be updated. Hologic values are adjusted to a common instrument model (QDR2000) prior to Z-score ...