This tool was initially thought of as an x-to-z score converter or z-score standardizer, hence its name. It is now a comprehensive statistical tool for univariate analysis.

To use it, enter a data set, one value per line. End each line by pressing the Enter key so these are recognized as individual entries.

Select how do you want to rank the results: high-to-low (descending), low-to-high (ascending), or default (as submitted). Ties are averaged with the first two modes.

To prevent abuse, we have limited input sets to the first 100,000 characters.

To export output (e.g., to Excel or Word), select it by clicking the red {S} link located at the top right of the generated output. Copy/paste as you usually would.

List at least three different statistical analyses where z-scores are used.

What is the meaning of negative z-scores and one/two-tail percentiles?

A student scored 70 (of 100) in a Chemistry test where the mean was 50 and the standard deviation was 20. His friend scored 80 (of 100) in a Spanish test where the mean was 70 and the standard deviation was 15. Which student outperformed a greater percent of students in his class?

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