This also means that the higher the magnitude of the z-score (whether negative or positive), the further the value is from the mean. Similarly, A negative z-score means that the value in question is less than the mean.įor example, if a value has a z-score of -1, it means the value is 1 standard deviation less than the mean, while a value with a z-score of -2 is 2 standard deviations less than the mean.
How to find z score given mean and standard deviation excel how to#
You now have the z-scores corresponding to every value in your dataset! How to Interpret the Z-score valueĪ z-score of 0 for a particular value indicates that the value in question is equal to the mean.Ī positive z-score means that the value in question is more than the mean.įor example, if a value has a z-score of +1, it means the value is 1 standard deviation more than the mean, while a value with a z-score +2 is 2 standard deviations more than the mean. There is no direct formula to calculate the z-score in Excel, but it’s fairly easy to get.Īs can be seen from the above formula, if you need to find the z-score for a given value in a set of data values, then you will need to first calculate the mean and standard deviation.Ĭonsider a set of sample data shown below:
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